Abstract
Drought stress usually causes a serious yield reduction in wheat production. Silicon (Si) has been reported to be able to alleviate drought stress damage; however, the mechanism is still poorly understood. In this article, the effects of Si (as sodium silicate) on some parameters related to oxidative damage, proline, soluble sugar, and inorganic ions in the leaves of wheat under 20% (w/v) polyethylene glycol (PEG-6000) simulative drought stress are investigated. PEG stress depressed the growth of shoot and root and decreased leaf water potential and chlorophyll concentration. Addition of 1.0 mM Si could partially improve the growth of shoot (but not root) and increase the leaf chlorophyll concentrations of stressed plants. Inclusion of Si in culture solution also maintained leaf water potential of stressed plants at the same level as that of the control plants. PEG stress induced significant accumulation of leaf hydrogen peroxide (H2O2) and malondialdehyde (MDA) as well as an increase in electrolyte leakage, which were all decreased by added silicon. These results suggest that stress-induced membrane lipid peroxidation could be partly alleviated by added silicon. Moreover, the results were also supported by the observation that PEG stress-induced decrease in glutathione concentration in the leaves was reversed by added silicon. The proline concentration in the leaves was markedly increased under PEG stress, whereas added silicon partially reversed this. PEG stress decreased the leaf soluble sugar concentration. There were significant negative regressions between proline concentration and both shoot dry weight and leaf chlorophyll concentrations, whereas there were positive regressions between the proline concentration and both H2O2 and MDA concentrations in the leaves, supporting the view that proline accumulation is a symptom of stress damage rather than stress tolerance. Addition of Si obviously increased Si accumulation in the shoot. Analyses of Na, Mg, K, and Ca showed no accumulation of these ions in the shoot (on the basis of per tissue dry weight) under water stress, and added Si even decreased their concentrations. These results suggest that under short-term PEG-induced water stress conditions (1 week), antioxidant defense, rather than osmotic adjustment, contributed to the improved wheat growth by Si.
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References
Agarie S, Agata W, Kubota F, Kaufman PB (1992) Physiological roles of silicon in photosynthesis and dry matter production in rice plants. Jpn J Crop Sci 60:200–206 in Japanese
Agarie S, Uchida H, Qgata W, Kubota F, Kaufman PB (1998) Effects of silicon on transpiration and leaf conductance in rice plants (Oryza sativa L). Plant Prod Sci 1(2):89–95
Al-aghabary Khalid, Zhu ZJ, Shi QH (2004) Influence of silicon supply on chlorophyll content, chlorophyll fluorescence, and antioxidative enzyme activities in tomato plants under salt stress. J Plant Nutr 27:2101–2115
Anderson ME (1985) Determination of glutathione and glutathione disulfides in biological samples. Methods Enzymol 113:548–570
Arndt SK, Wanek W, Clifford SC, Popp M (2000) Contrasting adaptations to drought stress in field-grown Ziziphus mauritiana and Prunus persica trees: water relations, osmotic adjustment and carbon isotope composition. Aust J Plant Physiol 27:985–996
Ashraf M, Foolad MR (2007) Roles of glycine betaine and proline in improving plant abiotic stress resistance. Environ Exp Bot 59:206–216
Bates LS, Waldren RP, Teare ID (1973) Rapid determination of free proline for water stress studies. Plant Soil 39:205–207
Christine HF, Humberto LD, James FD, Ian MS (1997) Hydrogen peroxide- and glutathione-associated mechanisms of acclimatory stress and signaling. Physiol Plant 100:241–254
de Melo SP, Korndörfer GH, Korndörfer CM, Lana RMQ, de Santana DG (2003) Silicon accumulation and water deficit tolerance in Brachiaria grasses. Sci Agric 60(4):755–759
de-Lacerda CF, Cambraia J, Oliva MA, Ruiz HA, Prisco JT (2003) Solute accumulation and distribution during shoot and leaf development in two sorghum genotypes under salt stress. Environ Exp Bot 49:107–120
Egert M, Tevini M (2002) Influence of drought on some physiological parameters symptomatic for oxidative stress in leaves of chives (Allium schoenoprasum). Environ Exp Bot 48:43–49
Epstein E (1999) Silicon. Annu Rev Plant Physiol Plant Mol Biol 50:641–664
Fauteux F, Chain F, Belzile F, Menzies J, Bélanger RR (2006) The protective role of silicon in the Arabidopsis—powdery mildew pathosystem. Proc Natl Acad Sci USA 103:17554–17559
Figen E, Ali I, David JP, Aydin G (2008) Interactive effects of salicylic acid and silicon on oxidative damage and antioxidant activity in spinach (Spinacia oleracea L. cv. Matador) grown under boron toxicity and salinity. Plant Growth Regul 55:207–219
Gao X, Zou C, Wang L, Zhang F (2004) Silicon improves water use efficiency in maize plants. J Plant Nutr 27(8):1457–1470
Gao X, Zou C, Wang L, Zhang F (2006) Silicon decreases transpiration rate and conductance from stomata of maize plants. J Plant Nutr 29:1637–1647
Gong H, Zhu X, Chen K, Wang S, Zhang C (2005) Silicon alleviates oxidative damage of wheat plants in pots under drought. Plant Sci 169:313–321
Gong HJ, Randall DP, Flowers TJ (2006) Silicon deposition in the root reduces sodium uptake in rice (Oryza sativa L.) seedlings by reducing bypass flow. Plant Cell Environ 29:1970–1979
Gong HJ, Chen KM, Zhao ZG, Chen GC, Zhou WJ (2008) Effects of silicon on defense of wheat against oxidative stress under drought at different developmental stages. Biol Plant 52:592–596
Gunes A, Inal A, Bagci EG, Pilbeam DJ (2007) Silicon-mediated changes of some physiological and enzymatic parameters symptomatic for oxidative stress in spinach and tomato grown in sodic-B toxic soil. Plant Soil 290:103–114
Hattori T, Inanaga S, Araki H, An P, Morita S, Luxová M, Lux A (2005) Application of silicon enhanced drought tolerance in Sorghum bicolour. Physiol Plant 123:459–466
Hattori T, Sonobe K, Inanaga S, An P, Tsuji W, Araki H, Eneji AE, Morita S (2007) Short term stomatal responses to light intensity changes and osmotic stress in sorghum seedlings raised with and without silicon. Environ Exp Bot 60:177–182
Inanaga S, Okasaka A (1996) Calcium and silicon binding compounds in cell walls of rice shoots. Soil Sci Plant Nutr 41:103–110
Inskeep WP, Bloom PR (1985) Extinction coefficients of chlorophyll a and chlorophyll b in N, N-dimethylformamide and 80% acetone. Plant Physiol 77:483–485
Law MY, Charles SA, Halliwell B (1983) Glutathione and ascorbic acid in spinach (Spinacea oleracea) chloroplasts. The effect of hydrogen peroxide and of paraquat. Biochem J 210:899–903
Leul M, Zhou WJ (1999) Alleviation of waterlogging damage in winter rape by uniconazole application: Effects on enzyme activity, lipid peroxidation and membrane integrity. J Plant Growth Regul 18:9–14
Li Q-F, Ma C-C, Shang Q-L (2007) Effects of silicon on photosynthesis and antioxidative enzymes of maize under drought stress. Chin J Appl Ecol 18:531–536
Liang Y (1999) Effects of silicon on enzyme activity and sodium, potassium and calcium concentration in barley under salt stress. Plant Soil 209:217–224
Liang Y, Chen Q, Liu Q, Zhang W, Ding R (2003) Exogenous silicon (Si) increases antioxidant enzyme activity and reduces lipid peroxidation in roots of salt-stressed barley (Hordeum vulgare L.). J Plant Physiol 160:157–1164
Liang Y, Zhang W, Chen Q, Ding R (2005) Effects of silicon on H+-ATPase and H+-PPase activity. fatty acid composition and fluidity of tonoplast vesicles from roots of salt-stressed barley (Hordeum vulgare L.). Environ Exp Bot 53:29–37
Liang Y, Zhang W, Chen Q, Liu Y, Ding R (2006) Effect of exogenous silicon (Si) on H+-ATPase activity, phospholipids and fluidity of plasma membrane in leaves of salt-stressed barley (Hordeum vulgare L.). Environ Exp Bot 57:212–219
Liang Y, Zhu J, Li Z, Chua G, Ding Y, Zhang J, Sun W (2008) Role of silicon in enhancing resistance to freezing stress in two contrasting winter wheat cultivars. Environ Exp Bot 64:286–294
Lin CC, Kao CH (2000) Effect of NaCl stress on H2O2 metabolism in rice leaves. Plant Growth Regul 30:151–155
Lutts S, Majerus V, Kinet J-M (1999) NaCl effects on proline metabolism in rice (Oryza sativa) seedlings. Physiol Plant 105:450–458
Madan S, Nainawatee HS, Jain RK, Chowdhury JB (1995) Proline and proline metabolizing enzymes in in vitro selected NaCl-tolerant Brassica juncea L. under salt stress. Ann Bot 76:51–57
Matoh T, Kairusmee P, Takahashi E (1986) Salt-induced damage to rice plants and alleviation effect of silicate. Soil Sci Plant Nutr 32:295–304
Mera MU, Beveridge TJ (1993) Mechanism of silicate binding to the bacterial cell wall in Bacillus subtilis. J Bacteriol 175:1936–1945
Nayyar H, Walia DP (2003) Water stress induced proline accumulation in contrasting wheat genotypes as affected by calcium and abscisic acid. Biol Plant 46:275–279
Rogalla H, Römheld V (2002) Role of leaf apoplast in silicon-mediated manganese tolerance of Cucumis sativus L. Plant Cell Environ 25:549–555
Saqib M, Zörb C, Schubert S (2008) Silicon-mediated improvement in the salt resistance of wheat (Triticum aestivum) results from increased sodium exclusion and resistance to oxidative stress. Funct Plant Biol 35:633–639
Smienoff N (1998) Plant resistance to environmental stress. Curr Opin Biotech 9:214–219
Tuna AL, Kaya C, Higgs D, Murillo-Amador B, Aydemir S, Girgin AR (2008) Silicon improves salinity tolerance in wheat plants. Environ Exp Bot 62:10–16
Wood AJ, Saneoka H, Rhodes D, Joly RJ, Gildsbrough PB (1996) Betaine aldehyde dehydrogenase in sorghum. Molecular cloning and expression of two related genes. Plant Physiol 110:1301–1308
Yan B, Dai Q, Liu X, Huang S, Wang Z (1996) Flooding-induced membrane damage, lipid oxidation and activated oxygen generation in corn leaves. Plant Soil 179:261–268
Yeo AR, Flowers SA, Rao G, Welfare K, Senanayake N, Flowers TJ (1999) Silicon reduces sodium uptake in rice (Oryza sativa L.) in saline conditions and this is accounted for by a reduction in the transpirational bypass flow. Plant Cell Environ 22:559–565
Yordanov I, Velikova V, Tsonev T (2000) Plant responses to drought, acclimation, and stress tolerance. Photosynthetica 38:171–186
Yoshida S (1965) Chemical aspects of the role of silicon in physiology of the rice plant. Bull Natl Inst Agric Sci B 15:18–58 (in Japanese)
Zhang ZJ, Li HZ, Zhou WJ, Takeuchi Y, Yoneyama K (2006) Effect of 5-aminolevulinic acid on development and salt tolerance of potato (Solanum tuberosum L.) microtubers in vitro. Plant Growth Regul 49:27–34
Zhang J, Wu LH, Wang MY (2008a) Can iron and zinc in rice grains (Oryza sativa L.) be biofortified with nitrogen fertilisation under pot conditions? J Sci Food Agric 88:1172–1177
Zhang WF, Zhang F, Raziuddin R, Gong HJ, Yang ZM, Lu L, Ye QF, Zhou WJ (2008b) Effects of 5-aminolevulinic acid on oilseed rape seedling growth under herbicide toxicity stress. J Plant Growth Regul 27:159–169
Zhu Z, Wei G, Li J, Qian Q, Yu J (2004) Silicon alleviates salt stress and increases antioxidant enzymes activity in leaves of salt-stressed cucumber (Cucumis sativus L.). Plant Sci 167:527–533
Zhu X, Gong H, Chen G, Wang S, Zhang C (2005) Different solute levels in two spring wheat cultivars induced by progressive field water stress at different developmental stages. J Arid Environ 62:1–14
Acknowledgements
This research was supported by National Natural Science Foundation of China (30600377, 30871652, 20632070), Zhejiang Provincial Natural Science Foundation of China (Y306034, R307095), National High Technology Research and Development Program of China (2006AA10A214), Scientific Research Fund of Zhejiang Provincial Education Department of China (20061377), and Special Research Support for Returned Scientist from Chinese Ministry of Personnel.
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Pei, Z.F., Ming, D.F., Liu, D. et al. Silicon Improves the Tolerance to Water-Deficit Stress Induced by Polyethylene Glycol in Wheat (Triticum aestivum L.) Seedlings. J Plant Growth Regul 29, 106–115 (2010). https://doi.org/10.1007/s00344-009-9120-9
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DOI: https://doi.org/10.1007/s00344-009-9120-9