水杨酸减轻水分亏缺对紫金娘幼苗光合器官和品质的损害

Q4 Agricultural and Biological Sciences
A. Foresti, L. C. Reis, Silvana Paula Quintão Scalon, D. Dresch, C. C. Santos, M. V. Jesus
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引用次数: 2

摘要

摘要本研究旨在探讨外源水杨酸对水亏条件下紫金石榴幼苗光合代谢和品质的影响及其复水化后的恢复潜力。对对照植株日灌溉(I)和水分亏缺(S)两种处理进行了评价,分别施用400 mg L-1水杨酸(SA)和不施用水杨酸(SA)共4种处理。幼苗分三次评估:试验开始时(T0),即中断灌溉时;当光合速率接近于零时(中断灌溉后P0 - 15天),即重新开始灌溉;以及光合速率恢复(REC)的时间。在水分限制条件下,月桂幼苗受到负向影响;水杨酸通过对叶片相对含水量、SPAD指数、光合代谢、超氧化物歧化酶和过氧化物酶活性以及幼苗生长的正作用,减轻了对光合机构的伤害。恢复灌溉后,金缕草有恢复的潜力。在水分亏缺期间和亏缺后,SA的施用有助于维持月子花幼苗的气体交换、光化学过程和质量,表明其促进了植物的抗性诱导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Salicylic acid mitigating damage to the photosynthetic apparatus and quality of Eugenia myrcianthes seedlings under water deficit
Abstract This study aimed to evaluate the effect of exogenous application of salicylic acid on the photosynthetic metabolism and quality of Eugenia myrcianthes seedlings under water deficit and their recovery potential after rehydration. Two water regimes were evaluated, as follows: control - plants irrigated daily (I) and water deficit (S), with and without the application of 400 mg L–1 of salicylic acid (SA), totaling four treatments. Seedlings were evaluated at three times: at the beginning of the experiment (T0), that is, when the irrigation was interrupted; when the photosynthetic rate reached values close to zero (P0 - 15 days after irrigation interruption), that is, when irrigation restarted; and when the photosynthetic rate was recovered (REC). Eugenia myrcianthes seedlings were negatively affected when subjected to water restriction; salicylic acid attenuated the damage to the photosynthetic apparatus by acting positively on the relative water content in the leaves, SPAD index, photosynthetic metabolism, superoxide dismutase and peroxidase enzyme activity, and seedling growth in P0. Eugenia myrchiantes presented potential for recovery after resumption irrigation. The application of SA contributed to the maintenance of gas exchanges, photochemical processes and quality of E. myrcianthes seedlings during and after water deficit, suggesting the promotion of plant resistance induction.
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来源期刊
Rodriguesia
Rodriguesia Agricultural and Biological Sciences-Horticulture
CiteScore
1.00
自引率
0.00%
发文量
55
审稿时长
13 weeks
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