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• W4294692018 abstract "Abstract It was previously reported that cauline leaf abscission in Arabidopsis is induced by a cycle of water stress and rewatering, which is regulated by the complex of INFLORESCENCE DEFICIENT IN ABSCISSION (IDA), HAESA (HAE), and HAESA‐LIKE2 (HSL2) kinases. However, the involvement of ethylene in this process was ruled out. Because this conclusion contradicts the well‐established role of ethylene in organ abscission induced by a cycle of water stress and rewatering, our present study was aimed to reevaluate the possible involvement of ethylene in this process. For this purpose, we examined the endogenous ethylene production during water stress and following rewatering, as well as the effects of exogenous ethylene and 1‐methylcyclopropene (1‐MCP), on cauline leaf abscission of Arabidopsis wild type. Additionally, we examined whether this stress induces cauline leaf abscission in ethylene‐insensitive Arabidopsis mutants. The results of the present study demonstrated that ethylene production rates increased significantly in cauline leaves at 4 h after rewatering of stressed plants and remained high for at least 24 h in plants water‐stressed to 40 and 30% of system weight. Ethylene treatment applied to well‐watered plants induced cauline leaf abscission, which was inhibited by 1‐MCP. Cauline leaf abscission was also inhibited by 1‐MCP applied during a cycle of water stress and rewatering. Finally, no abscission occurred in two ethylene‐insensitive mutants, ein2‐1 and ein2‐5 , following a cycle of water stress and rewatering. Taken together, these results clearly indicate that ethylene is involved in Arabidopsis cauline leaf abscission induced by water stress and rewatering. Our results show that ethylene is involved in Arabidopsis cauline leaf abscission induced by water stress and rewatering, similar to leaf abscission in other plants." @default.
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• W4294692018 date "2022-09-01" @default.
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• W4294692018 title "Reevaluation of ethylene role in Arabidopsis cauline leaf abscission induced by water stress and rewatering" @default.
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• W4294692018 doi "https://doi.org/10.1002/pld3.444" @default.
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