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Hydrogen-rich water promotes elongation of hypocotyls and roots in plants through mediating the level of endogenous gibberellin and auxin

Wu, Q, Su, N, Huang, X, Ling, X, Yu, M, Cui, J and Shabala, SI ORCID: 0000-0002-5360-8496 2020 , 'Hydrogen-rich water promotes elongation of hypocotyls and roots in plants through mediating the level of endogenous gibberellin and auxin' , Functional Plant Biology, vol. 47, no. 9 , pp. 771-778 , doi: 10.1071/FP19107.

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Abstract

The aim of this study was to investigate effects of the hydrogen-rich water (HRW) on the vegetable growth, and explore the possibility of applying HRW for protected cultivation of vegetables. Results showed that compared with control, HRW treatment significantly promoted fresh weight, hypocotyl length and root length of mung bean seedlings. The strongest stimulation was observed for 480 mu M H-2 (60% of saturated HRW concentration) treatment. This concentration was used in the following experiments. The enhanced cell elongation was correlated with the changes in the level of endogenous phytohormones. In the dark-grown hypocotyls and roots of mung bean seedlings, HRW significantly increased the content of IAA and GA(3). Addition of GA(3) enhanced the hypocotyl elongation only. uniconazole, an inhibitor of GA(3) biosynthesis, inhibited HRW-induced hypocotyl elongation, but did not affect root elongation. Exogenous application of IAA promoted HRW effects on elongation of both the hypocotyl and the root, while the IAA biosynthesis inhibitor TIBA negated the above affects. The general nature of HRW-induced growth-promoting effects was further confirmed in experiments involving cucumber and radish seedlings. Taken together, HRW treatment promoted growth of seedlings, by stimulating elongation of hypocotyl and root cells, via HRW-induced increase in GA and IAA content in the hypocotyl and the root respectively.

Item Type: Article
Authors/Creators:Wu, Q and Su, N and Huang, X and Ling, X and Yu, M and Cui, J and Shabala, SI
Keywords: cell length, hypocotyl elongation, mung bean seedlings, plant hormones, root elongation
Journal or Publication Title: Functional Plant Biology
Publisher: C S I R O Publishing
ISSN: 1445-4408
DOI / ID Number: 10.1071/FP19107
Copyright Information:

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