リケラボ論文検索は、全国の大学リポジトリにある学位論文・教授論文を一括検索できる論文検索サービスです。

リケラボ 全国の大学リポジトリにある学位論文・教授論文を一括検索するならリケラボ論文検索大学・研究所にある論文を検索できる

リケラボ 全国の大学リポジトリにある学位論文・教授論文を一括検索するならリケラボ論文検索大学・研究所にある論文を検索できる

大学・研究所にある論文を検索できる 「Biuret toxicity induces accumulation of nitrogen-rich compounds in rice plants」の論文概要。リケラボ論文検索は、全国の大学リポジトリにある学位論文・教授論文を一括検索できる論文検索サービスです。

コピーが完了しました

URLをコピーしました

論文の公開元へ論文の公開元へ
書き出し

Biuret toxicity induces accumulation of nitrogen-rich compounds in rice plants

Ochiai, Kumiko Nomura, Yosuke Uesugi, Asuka Matoh, Toru 京都大学 DOI:10.1007/s11104-022-05857-9

2023.04

概要

[Aims] Excess biuret, a common impurity in urea fertilizers, is toxic to plants. Little is known about the mechanisms of biuret toxicity in plants. This study aimed to investigate the accumulation of biuret and the changes in metabolites in rice (Oryza sativa) plants under biuret toxicity. [Methods] A previous study had shown that transgenic rice plants overexpressing bacterial biuret hydrolase had improved biuret tolerance. Here, we grew wild-type and bacterial biuret hydrolase-overexpressing rice plants in hydroponics at different biuret levels. Concentrations of biuret and allantoin, a nitrogenous intermediate in the purine degradation pathway, in the plants were determined. The expression levels of genes related to purine degradation and ureide metabolisms were analyzed using wild-type plants. Additionally, we performed a metabolome analysis using rice suspension cells. [Results] The biuret hydrolase-overexpressing plants did not contain biuret, whereas wild-type plants accumulated biuret in shoots in the order of mmol L−1 tissue water. The concentration of allantoin in shoots of wild-type plants under biuret toxicity was higher than those in control conditions. Inhibition of allantoinase activity by biuret was not detected, and allantoin accumulation appeared to be associated with changes in the expression of allantoinase, allantoate amidohydrolase and putative allantoin transporter genes. Furthermore, another nitrogenous compound citrulline, which is a non-protein amino acid, accumulated in rice suspension cells under biuret toxicity. [Conclusion] The accumulation of these compounds suggests that rice plants subjected to biuret toxicity need to reduce the concentration of surplus ammonium ions via synthesizing nitrogen-rich compounds.

参考文献

455

456

Akashi K, Miyake C, Yokota A (2001) Citrulline, a novel compatible solute in drought-tolerant

457

wild watermelon leaves, is an efficient hydroxyl radical scavenger. FEBS Lett 508:438–442.

458

https://doi.org/10.1016/s0014-5793(01)03123-4

459

Aukema KG, Tassoulas LJ, Robinson SL, Konopatski JF, Bygd MD, Wackett LP (2020) Cyanuric

460

acid biodegradation via biuret: physiology, taxonomy, and geospatial distribution. Appl

461

Environ Microbiol 86:e01964-19. https://doi.org/10.1128/AEM.01964-19

462

Baba A, Hasezawa S, Syono K (1986) Cultivation of rice protoplasts and their transformation

463

mediated

464

https://doi.org/10.1093/oxfordjournals.pcp.a077122

465

by

Agrobacterium

spheroplasts.

Plant

Cell

Physiol

27:463–471.

Blume C, Ost J, Mühlenbruch M, Peterhänsel C, Laxa M (2019) Low CO2 induces urea cycle

466

intermediate

467

https://doi.org/10.1371/journal.pone.0210342

accumulation

in

Arabidopsis

thaliana.

PloS

One

14:e0210342.

468

Caldana C, Scheible WR, Mueller-Roeber B, Ruzicic S (2007) A quantitative RT-PCR platform

469

for high-throughput expression profiling of 2500 rice transcription factors. Plant Method, 3:7.

470

https://doi.org/10.1186/1746-4811-3-7

471

Cameron SM, Durchschein K, Richman JE, Sadowsky MJ, Wackett LP (2011) A new family of

472

biuret hydrolases involved in S-triazine ring metabolism. ACS Catal 2011:1075–1082.

473

https://doi.org/10.1021/cs200295n

474

Casartelli A, Melino VJ, Baumann U, Riboni M, Suchecki R, Jayasinghe NS, Mendis H,

475

Watanabe M, Erban A, Zuther E, Hoefgen R, Roessner U, Okamoto M, Heuer S (2019)

476

Opposite fates of the purine metabolite allantoin under water and nitrogen limitations in bread

477

wheat. Plant Mol Biol 99:477–497. https://doi.org/10.1007/s11103-019-00831-z

22

478

Collier R, Tegeder M (2012) Soybean ureide transporters play a critical role in nodule

479

development, function and nitrogen export. Plant J 72:355–367. https://doi.org/10.1111/j.1365-

480

313X.2012.05086.x

481

Desimone M, Catoni E, Ludewig U, Hilpert M, Schneider A, Kunze R, Tegeder M, Frommer W

482

B, Schumacher K (2002) A novel superfamily of transporters for allantoin and other oxo

483

derivatives of nitrogen heterocyclic compounds in Arabidopsis. Plant Cell 14:847–856.

484

https://doi.org/10.1105/tpc.010458

485

486

Duran VA, Todd CD (2012) Four allantoinase genes are expressed in nitrogen-fixing soybean.

Plant Physiol Biochem 54:149–155. https://doi.org/10.1016/j.plaphy.2012.03.002

487

Esquirol L, Peat TS, Wilding M, Lucent D, French NG, Hartley CJ, Newman J, Scott C (2018)

488

Structural and biochemical characterization of the biuret hydrolase (BiuH) from the cyanuric

489

acid catabolism pathway of Rhizobium leguminasorum bv. viciae 3841. PLoS One

490

13:e0192736. https://doi.org/10.1371/journal.pone.0192736

491

Gupta KJ, Brotman Y, Segu S, Zeier T, Zeier J, Persijn ST, Cristescu SM, Harren FJ, Bauwe H,

492

Fernie AR, Kaiser WM, Mur LA (2013) The form of nitrogen nutrition affects resistance

493

against Pseudomonas syringae pv. phaseolicola in tobacco. J Exp Bot, 64:553–568.

494

https://doi.org/10.1093/jxb/ers348

495

Hewitt EJ (1966) The composition of the nutrient solution. In: Hewitt EJ (ed) Sand and water

496

culture methods used in the study of plant nutrition. Farnham Royal Bucks, Commonwealth

497

Agricultural Bureaux, Slough, pp 190.

498

499

500

501

Huang XY, Li M, Luo R, Zhao FJ, Salt DE (2019) Epigenetic regulation of sulfur homeostasis in

plants. J Exp Bot 70:4171–4182. https://doi.org/10.1093/jxb/erz218

Irani S, Todd CD (2016) Ureide metabolism under abiotic stress in Arabidopsis thaliana. J Plant

Physiology 199:87–95. https://doi.org/10.1016/j.jplph.2016.05.011

23

502

503

Joshi V, Fernie AR (2017) Citrulline metabolism in plants. Amino Acids 49:1543–1559.

https://doi.org/10.1007/s00726-017-2468-4

504

Kaur H, Chowrasia S, Gaur VS, Mondal TK (2021) Allantoin: Emerging role in plant abiotic

505

stress tolerance. Plant Mol Biol Report 39:648–661. https://doi.org/10.1007/s11105-021-

506

01280-z

507

Kawasaki S, Miyake C, Kohchi T, Fujii S, Uchida M, Yokota A (2000) Responses of wild

508

watermelon to drought stress: accumulation of an ArgE homologue and citrulline in leaves

509

during water deficits. Plant Cell Physiol 41:864–873. https://doi.org/10.1093/pcp/pcd005

510

Lee DK, Redillas M, Jung H, Choi S, Kim YS, Kim JK (2018) A nitrogen molecular sensing

511

system, comprised of the ALLANTOINASE and UREIDE PERMEASE 1 genes, can be used

512

to monitor N status in rice. Front Plant Sci 9:444. https://doi.org/10.3389/fpls.2018.00444

513

Lescano I, Bogino MF, Martini C, Tessi TM, González CA, Schumacher K, Desimone M. (2020a)

514

Ureide permease 5 (atups5) connects cell compartments involved in ureide metabolism. Plant

515

Physiol, 182:1310–1325. https://doi.org/10.1104/pp.19.01136

516

Lescano CI, Martini C, González CA, Desimone M (2016) Allantoin accumulation mediated by

517

allantoinase downregulation and transport by Ureide Permease 5 confers salt stress tolerance

518

to Arabidopsis plants. Plant Mol Biol 91:581–595. https://doi.org/10.1007/s11103-016-0490-7

519

Lescano I, Devegili AM, Martini C, Tessi TM, González CA, Desimone M (2020b) Ureide

520

metabolism in Arabidopsis thaliana is modulated by C:N balance. J Plant Res 133:739–749.

521

https://doi.org/10.1007/s10265-020-01215-x

522

523

524

Ludwig RA (1993) Arabidopsis chloroplasts dissimilate L-arginine and L-citrulline for use as N

source. Plant Physiol 101:429–434. https://doi.org/10.1104/pp.101.2.429

Mikkelsen RL (1990) Biuret in urea fertilizer. Fertilizer Res 26: 311-318

24

525

526

527

Moore S, Stein WH (1954). A modified ninhydrin reagent for the photometric determination of

amino acids and related compounds. J Biol Chem, 211:907–913.

Nourimand M, Todd CD (2016) Allantoin increases cadmium tolerance in Arabidopsis via

528

activation

529

https://doi.org/10.1093/pcp/pcw162

of

antioxidant

mechanisms.

Plant

Cell

Physiol

57:2485–2496.

530

Ochiai K, Uesugi A, Masuda Y, Nishii M, Matoh T (2020) Overexpression of exogenous biuret

531

hydrolase in rice plants confers tolerance to biuret toxicity. Plant Direct 4:e00290.

532

https://doi.org/10.1002/pld3.290

533

Ogasawara S, Ezaki M, Ishida R, Sueyoshi K, Saito S, Hiradate Y, Kudo T, Obara M, Kojima S,

534

Uozumi N, Tanemura K, Hayakawa T (2021) Rice amino acid transporter-like 6 (OsATL6) is

535

involved in amino acid homeostasis by modulating the vacuolar storage of glutamine in roots.

536

Plant J 107:1616–1630. https://doi.org/10.1111/tpj.15403

537

538

Ogata T, Yamamoto M (1959) Effects of biuret on the metabolism of germinating plant. I. Jpn J

Soil Sci Plant Nutr 29:549-555 (in Japanese)

539

Pang Z, Chong J, Zhou G, de Lima Morais DA, Chang L, Barrette M, Gauthier C, Jacques PÉ, Li

540

S, Xia J (2021) MetaboAnalyst 5.0: narrowing the gap between raw spectra and functional

541

insights. Nucleic Acids Res 49:W388–W396. https://doi.org/10.1093/nar/gkab382

542

Redillas M, Bang SW, Lee DK, Kim YS, Jung H, Chung PJ, Suh JW, Kim JK (2019) Allantoin

543

accumulation through overexpression of ureide permease 1 improves rice growth under limited

544

nitrogen conditions. Plant Biotechnol J 17:1289–1301. https://doi.org/10.1111/pbi.13054

545

Robinson SL, Badalamenti JP, Dodge AG, Tassoulas LJ, Wackett LP (2018) Microbial

546

biodegradation of biuret: defining biuret hydrolases within the isochorismatase superfamily.

547

Environ microbiol 20:2099–2111. https://doi.org/10.1111/1462-2920.14094

25

548

Rocha PS, Sheikh M, Melchiorre R, Fagard M, Boutet S, Loach R, Moffatt B, Wagner C,

549

Vaucheret H, Furner I (2005) The Arabidopsis HOMOLOGY-DEPENDENT GENE

550

SILENCING1 gene codes for an S-adenosyl-L-homocysteine hydrolase required for DNA

551

methylation-dependent

552

https://doi.org/10.1105/tpc.104.028332

gene

silencing.

Plant

Cell

17:404–417.

553

Sakurai N, Ara T, Enomoto M, Motegi T, Morishita Y, Kurabayashi A, Iijima Y, Ogata Y,

554

Nakajima D, Suzuki H, Shibata D (2014) Tools and databases of the KOMICS web portal for

555

preprocessing, mining, and dissemination of metabolomics data. BioMed Res Int 2014:194812.

556

https://doi.org/10.1155/2014/194812

557

Schubert KR (1986) Products of biological nitrogen fixation in higher plants: Synthesis, transport,

558

and

559

https://doi.org/10.1146/annurev.pp.37.060186.002543

metabolism.

Annu

Rev

Plant

Physiol

37:539–574.

560

Soltabayeva A, Srivastava S, Kurmanbayeva A, Bekturova A, Fluhr R, Sagi M (2018) Early

561

senescence in older leaves of low nitrate-grown atxdh1 uncovers a role for purine catabolism

562

in n supply. Plant Physiol 178:1027–1044. https://doi.org/10.1104/pp.18.00795

563

Song Q, Joshi M, DiPiazza J, Joshi V (2020). Functional relevance of citrulline in the vegetative

564

tissues

565

https://doi.org/10.3389/fpls.2020.00512

of

watermelon

during

abiotic

stresses.

Front

Plant

Sci,

11:512.

566

Watanabe S, Matsumoto M, Hakomori Y, Takagi H, Shimada H, Sakamoto A (2014) The purine

567

metabolite allantoin enhances abiotic stress tolerance through synergistic activation of abscisic

568

acid metabolism. Plant Cell Environ 37:1022–1036. https://doi.org/10.1111/pce.12218

569

570

Webster GC, Berner RA, Gansa AN (1957) The effect of biuret on protein synthesis in plants.

Plant Physiol 32:60–61. https://doi.org/10.1104/pp.32.1.60

26

571

572

573

574

Yamaji N, Ma JF (2009) A transporter at the node responsible for intervascular transfer of silicon

in rice. Plant Cell 21:2878–2883. https://doi.org/10.1105/tpc.109.069831

Young EZ, Conway CF (1942) On the estimation of allantoin by the riminischryver reaction. J

Biol Chem 142:839-853. https://doi.org/10.1016/S0021-9258(18)45082-X

575

27

576

Statements and Declarations

577

Funding: This work was supported in part by JSPS KAKENHI Grant Number JP19K05755.

578

579

Competing interests: The authors have no relevant financial or non-financial interests to

580

disclose.

581

582

Author contributions: Kumiko Ochiai and Toru Matoh conceived and designed the research.

583

Kumiko Ochiai and Yosuke Nomura performed experiments and analyzed the data. Asuka

584

Uesugi generated biuret hydrolase-overexpressing rice lines. Kumiko Ochiai wrote the

585

manuscript with input from other authors.

586

587

Data availability: the data supporting the findings of this study are available within the article

588

and its supplementary materials.

589

590

28

591

Figure legend

592

Fig. 1 Effects of biuret on dry weight (a, d), biuret concentration (b, e), and allantoin concentration

593

(c, f) in roots and shoots of 7-day-old wild-type rice plants (a–c) and 9-day-old biuret hydrolase-

594

overexpressing rice lines (d–f). Bars and circles represent mean and each sample, respectively.

595

nd means not detected. (a–c) Wild-type plants were grown with 0, 0,1, and 0.3 mmol L-1 biuret

596

supplemented in the culture solution. Ten seedlings were combined for a single sample. Different

597

alphabets indicate significant difference among treatments in each organ (p < 0.05, Tukey’s test,

598

n = 3). (d–f) Wild-type and two independent transgenic lines (B3-9-1 and B2-3-3) were grown

599

with or without 0.3 mmol L-1 biuret in the culture solution. Four to six plants were combined into

600

one sample. Gray and black bars represent control and biuret-treated plants, respectively.

601

Asterisks indicate significant difference between the treatment (*p < 0.05; **p < 0.01, Welch’s t-

602

test, n = 3). Different alphabets indicate significant difference in each organ (p < 0.05, Tukey’s

603

test, n = 3).

604

605

Fig. 2 Inhibitory effect of biuret for allantoinase activity. Crude extracts were prepared from

606

shoots of 9-day-old rice seedlings hydroponically grown without biuret. Extracts were incubated

607

at 30ºC with 10 mmol L-1 allantoin, 50 mmol L-1 Tricine-NaOH (pH8.0), 2mmol L-1 MnSO4, and

608

the desired concentration of biuret for 30min. The amount of allantoic acid produced from

609

allantoin was colorimetorically determined. Same shape symbols indicate a same crude extract.

610

Crossbars represent the mean value. The means were not significantly different among treatments

611

at 5% level (One-way ANOVA with blocking, n = 4).

612

613

Fig. 3 Relative expression of genes related to purine degradation and ureide metabolisms in roots

614

and shoots of 4 to 7-day old rice seedlings. Rice plants were hydroponically grown under the

615

control condition and 0.3 mmol L-1 biuret toxicity. Data obtained from two independent trials,

29

616

each with three replicates, are combined and shown. The relative expression levels of OsXO (a),

617

OsUO (b), OsALNS (c), OsALN (d), OsAAH (e), OsUGlyAH (f), OsUAH (g), OsUPS1 (h),

618

OsUPS2 (i), and OsUPS3 (j). The expression levels were normalized to the expression of

619

Ubiquitin and Actin1 and expressed in log2 scale. Gray and black symbols indicate control and

620

biuret treated samples, respectively. Crossbars indicate means of the six samples. Asterisks

621

indicate statistically significant difference between the treatments at the time point. *p < 0.05;

622

**p < 0.01; ***p < 0.001 (n = 6, Welch’s t-test). Numerical values above asterisks indicate log2

623

fold-change relative to the control plants.

624

625

Fig. 4 Principal component analysis of metabolomics profile of control and biuret-treated rice

626

suspension cells. Rice cells were transferred into a medium without biuret or with 0.3 mmol L-1

627

biuret and harvested 3 and 5 days after transfer. Closed symbols indicate control cells, and open

628

symbols indicate biuret-treated cells. Circles indicate day 3 samples, and triangles indicate day 5

629

samples.

630

631

Fig. 5 Normalized peak intensities of differentially accumulated metabolites between control and

632

biuret treated rice suspension cells. Peaks with significantly different intensity between the

633

control-group and biuret-group are shown in the list (p < 0.05, Welch’s t-test, n = 4). RT column

634

indicate retention time in second. In the formula column, the formula is shown when the formula

635

is uniquely determined from the m/z value, blank when there are multiple possible candidates,

636

and unknown when there are no candidates. D3C: day 3 control cell sample; D3B: day 3 biuret-

637

treated cell sample; D5C: day 5 control cell sample; D5B: day 5 biuret-treated cell sample.

638

639

Fig. 6 Free amino acids concentration (a) and allantoin concentration (b) in 8-day-old seedlings.

640

Rice plants were hydroponically grown under the control condition and 0.3 mmol L -1 biuret

641

toxicity. Five plants were combined for a single sample. Boxes indicate the mean of three samples,

30

642

and symbols indicate each sample. Asterisks indicate a statistically significant difference between

643

the treatments (Welch’s t-test). **p < 0.01; ***p < 0.001.

644

31

645

Supplemental Materials

646

Supplemental Fig. S1 Allantoin concentration in 9-day-old rice shoots measured by colorimetric

647

and HPLC-UV. Plants were grown hydroponically under the three biuret treatments. Control:

648

plants did not receive biuret; NB: plants were grown without biuret for three days after sowing,

649

and with 0.3 mmol L-1 biuret supplemented in the culture solution from the fourth day; BN: plants

650

were grown with 0.3 mmol L-1 biuret for 6 days after sowing and transferred to new culture

651

solution without biuret on the seventh day. Fresh shoots of 9-day-old seedlings were ground under

652

liquid N2 and extracted with 10-fold volume of distilled water. After centrifugation, the

653

supernatant was used for allantoin determination. Gray boxes indicate mean allantoin

654

concentration determined colorimetrically and black boxes indicate that determined by the HPLC

655

method. Symbols indicate each sample. The statistical significance of the differences between the

656

methods was determined through paired t-test (n = 2). ns: not significant.

657

658

Supplemental Fig. S2 Pictures of 9-day-old wild-type rice seedlings and two biuret hydrolase-

659

overexpressing lines. From left to right: wild type and overexpressing lines B3-9-1 and B2-3-3.

660

Upper: seedlings grown in the control culture solution. Lower: seedlings grown in the culture

661

solution supplemented with 0.3 mmol L-1 biuret. Bars show 10 cm.

662

663

Supplemental Fig. S3 Relative expression levels of (a) OsALN and (b) OsUO in 3 to 9-day-old

664

rice shoots in the preliminary experiment. Rice plants were hydroponically grown with or

665

without 0.3 mmol L-1 biuret supplied in the culture solution. Measurements were made using

666

plants grown in an independent trial from those shown in Figure 3. The relative expression

667

levels were normalized to those of Ubiquitin and Actin1 and expressed on a log2 scale. Gray

668

and black squares indicate control and biuret-treated plants, respectively; data represent the

32

669

mean ± SD (n = 4). Asterisks indicate statistically significant differences between treatments at

670

the time point (Welch’s t-test). *p < 0.05; **p < 0.01; ***p < 0.001. Numerical values above

671

asterisks indicate log2 fold-change relative to the control plants.

672

673

Supplemental Data S1 Peak intensities in Metabolome analysis.

674

33

Fig. 1 Effects of biuret on dry weight (a, d), biuret concentration (b, e), and allantoin concentration

(c, f) in roots and shoots of 7-day-old wild-type rice plants (a–c) and 9-day-old biuret hydrolaseoverexpressing rice lines (d–f). Bars and circles represent mean and each sample, respectively.

nd means not detected. (a–c) Wild-type plants were grown with 0, 0,1, and 0.3 mmol L-1 biuret

supplemented in the culture solution. Ten seedlings were combined for a single sample. Different

alphabets indicate significant difference among treatments in each organ (p < 0.05, Tukey’s test,

n = 3). (d–f) Wild-type and two independent transgenic lines (B3-9-1 and B2-3-3) were grown

with or without 0.3 mmol L-1 biuret in the culture solution. Four to six plants were combined into

one sample. Gray and black bars represent control and biuret-treated plants, respectively.

Asterisks indicate significant difference between the treatment (*p < 0.05; **p < 0.01, Welch’s ttest, n = 3). Different alphabets indicate significant difference in each organ (p < 0.05, Tukey’s

test, n = 3).

34

Fig. 2 Inhibitory effect of biuret for allantoinase activity. Crude extracts were prepared from

shoots of 9-day-old rice seedlings hydroponically grown without biuret. Extracts were incubated

at 30ºC with 10 mmol L-1 allantoin, 50 mmol L-1 Tricine-NaOH (pH8.0), 2mmol L-1 MnSO4,

and the desired concentration of biuret for 30min. The amount of allantoic acid produced from

allantoin was colorimetorically determined. Same shape symbols indicate a same crude extract.

Crossbars represent the mean value. The means were not significantly different among

treatments at 5% level (One-way ANOVA with blocking, n = 4).

35

Fig. 3 Relative expression of genes related to purine degradation and ureide metabolisms in roots

and shoots of 4 to 7-day old rice seedlings. Rice plants were hydroponically grown under the

control condition and 0.3 mmol L-1 biuret toxicity. Data obtained from two independent trials,

36

each with three replicates, are combined and shown. The relative expression levels of OsXO (a),

OsUO (b), OsALNS (c), OsALN (d), OsAAH (e), OsUGlyAH (f), OsUAH (g), OsUPS1 (h),

OsUPS2 (i), and OsUPS3 (j). The expression levels were normalized to the expression of

Ubiquitin and Actin1 and expressed in log2 scale. Gray and black symbols indicate control and

biuret treated samples, respectively. Crossbars indicate means of the six samples. Asterisks

indicate statistically significant difference between the treatments at the time point. *p < 0.05;

**p < 0.01; ***p < 0.001 (n = 6, Welch’s t-test). Numerical values above asterisks indicate log2

fold-change relative to the control plants.

37

Fig. 4 Principal component analysis of metabolomics profile of control and biuret-treated rice

suspension cells. Rice cells were transferred into a medium without biuret or with 0.3 mmol L -1

biuret and harvested 3 and 5 days after transfer. Closed symbols indicate control cells, and open

symbols indicate biuret-treated cells. Circles indicate day 3 samples, and triangles indicate day 5

samples.

38

Normalized intensity

ID

RT (sec)

m/z

Formula

D3C1 D3C2 D5C1 D5C2 D3B1 D3B2 D5B1 D5B2

47

37

102.0913

C5H11N1O1

-11

-11

-11

-11

239

54

170.0576

C4H12N1O4P1

-11

-11

-11

-11

-2

-1

-1

-1

310

55

176.1029

C6H13N3O3

326

56

159.0763

C6H10N2O3

342

57

120.0655

C4H9N1O3

372

58

138.0549

C7H7N1O2

432

58

268.0848

C9H17N1O6S1

-11

-11

-11

-11

-1

-1

448

59

385.1288

-11

-11

-11

-11

811

80

206.0480

C7H11N1O4S1

-11

-11

-11

-11

826

82

236.0585

C11H10N3O1Cl1

-11

-11

-11

-11

-3

864

83

238.0742

C8H15N1O5S1

-11

-11

-11

-11

-2

1100

99

284.1337

C10H21N1O8

-11

-11

-11

-11

1117

102

376.1283

-11

-11

-11

-11

1127

103

247.1286

C10H18N2O5

-11

-11

-11

-11

-2

1161

106

163.0599

C6H10O5

-11

-11

-11

1202

110

385.1287

-11

-11

-11

1240

114

387.1245

-11

-11

-11

-11

1247

114

136.0616

C5H5N5

-11

-11

-11

-11

-3

-1

1248

114

193.5696

Unknown Peak

-11

-11

-11

-11

1251

114

170.0651

Unknown Peak

-11

-11

-11

-11

1354

138

296.1160

C14H18N3O2Cl1

-1

-11

-11

-11

-1

-1

1719

263

529.1268

-11

-11

-11

-11

1722

264

190.1072

1805

278

285.0901

-11

-11

-11

-11

1867

292

149.1171

C7H16O3

-11

-11

-11

-11

-1

1954

309

304.1389

C13H21N1O7

2067

322

229.1545

C11H20N2O3

-11

-11

-11

-1

2219

339

352.1389

C17H21N1O7

-11

-11

-11

2222

339

445.0944

-11

-11

-11

-11

2340

360

587.2546

-1

-11

-11

-11

-1

2444

386

293.1164

-11

-11

-11

-11

2470

394

159.1014

-11

-11

-11

-11

2476

395

335.1334

2477

395

370.1706

2669

487

141.1273

-11

-11

-11

-11

2837

645

1118.7230

-4

-11

-11

-11

-3

-3

-2

-2

3022

806

522.3552

C26H52N1O7P1

-1

-11

-11

-11

-2

3183

965

487.3603

Unknown Peak

-1

-1

-1

-1

-11

-11

-11

-2

C8H15N1O4

C8H14O3

C9H16O1

Fig. 5 Normalized peak intensities of differentially accumulated metabolites between control

and biuret treated rice suspension cells. Peaks with significantly different intensity between the

control-group and biuret-group are shown in the list (p < 0.05, Welch’s t-test, n = 4). RT column

indicate retention time in second. In the formula column, the formula is shown when the

formula is uniquely determined from the m/z value, blank when there are multiple possible

candidates, and unknown when there are no candidates. D3C: day 3 control cell sample; D3B:

day 3 biuret-treated cell sample; D5C: day 5 control cell sample; D5B: day 5 biuret-treated cell

sample.

39

Fig. 6 Free amino acids concentration (a) and allantoin concentration (b) in 8-day-old seedlings.

Rice plants were hydroponically grown under the control condition and 0.3 mmol L -1 biuret

toxicity. Five plants were combined for a single sample. Boxes indicate the mean of three samples,

and symbols indicate each sample. Asterisks indicate a statistically significant difference between

the treatments (Welch’s t-test). **p < 0.01; ***p < 0.001.

40

...

参考文献をもっと見る

全国の大学の
卒論・修論・学位論文

一発検索!

この論文の関連論文を見る