Exogenous hydrogen sulfide enhanced Al stress tolerance in tea plant Camellia sinensis

Exogenous hydrogen sulfide enhanced Al stress tolerance in tea plant Camellia sinensis

Al is an essential element for the growth of tea plants roots, but excessive Al affects growth and development of Camellia sinensis. The underlying mechanism, particularly regulation of gas signaling molecule H2S, remains unclear. This study aims to uncover the function of H2S on C. sinensis under A...

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Bibliographic Details
Main Authors: Anqi Xing, Zaifa Shu, Peifang Huang, Yang Zhang, Xueyan Sui, Shuai Wan, Shujing Liu, Xuan Chen, Xinghui Li, Yuhua Wang
Format: Article
Language:English
Published: Maximum Academic Press 2024-01-01
Series:Beverage Plant Research
Subjects:
hydrogen sulfide
al stress
camellia sinensis
Online Access:https://www.maxapress.com/article/doi/10.48130/bpr-0024-0013
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Summary:Al is an essential element for the growth of tea plants roots, but excessive Al affects growth and development of Camellia sinensis. The underlying mechanism, particularly regulation of gas signaling molecule H2S, remains unclear. This study aims to uncover the function of H2S on C. sinensis under Al stress by treating hydroponic tea seedlings with different Al concentration, Na2S (H2S donor) and DL-propargylglycine (PAG, synthesis inhibitor). High concentration of Al inhibits growth of tea roots, while H2S significantly improves the effects caused by Al stress. Whether it is 2 mM Al3+ or 4 mM Al3+, H2S reduces content of Al in the entire plant and roots, increases root activity, further promotes root growth, increases fresh and dry weight, regulates ion homeostasis, improves cell structure, increases chlorophyll content, and thus reduces the damage of Al toxicity in C. sinensis. Moreover, in response to the stress of 2 mM Al3+, H2S simultaneously alleviates Al stress by regulating substances related to antioxidant pathways, increasing content of GSH and GSSG, enhancing activity of GST, GR, LCD, and key components of tea, in order to alleviate Al stress. These approaches have effectively improved Al tolerance of C. sinensis, providing a new perspective for the study of H2S enhancing Al tolerance.
ISSN:2769-2108

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