1-Aminocyclopropane-1-carboxylic acid and its analogs alleviate heat stress damage in the marine red alga Neopyropia yezoensis (Rhodophyta)
1-Aminocyclopropane-1-carboxylic acid and its analogs alleviate heat stress damage in the marine red alga Neopyropia yezoensis (Rhodophyta)
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DOI：
10.1007/s10811-022-02727-w
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发表时间：
2022-03
影响因子：
3.3
通讯作者：
T. Uji;H. Mizuta
中科院分区：
文献类型：
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作者：
T. Uji;H. Mizuta
热胁迫破坏藻类的生长、发育和生理过程，如光合作用，并最终降低海藻的生产力。以往对作物的研究表明，在胁迫之前或同时外源施用植物激素可以减轻非生物胁迫（包括热胁迫）的负面影响。然而，有有限的信息在海藻中的植物激素诱导的非生物胁迫耐受性。在本研究中，主要的植物激素脱落酸和水杨酸的应用未能减轻热胁迫对海洋红藻Neopyropia yezoensis的负面影响，而1-氨基环丙烷-1-羧酸（ACC），植物激素乙烯的直接前体，调节耐热性。此外，ACC类似物1-氨基环丁烷-1-羧酸和α-氨基异丁酸增强了对热胁迫的耐受性。ACC增加了参与抗氧化防御系统的基因的表达，以保护光合作用和呼吸作用。这些结果表明，ACC作为一种植物激素，以减轻对热胁迫的影响独立于乙烯inN。yezoensis。
Heat stress disrupts algal growth, development, and physiological processes, such as photosynthesis, and eventually decreases seaweed productivity. Previous studies of crop plants have revealed that exogenous application of phytohormones prior or parallel to stress can alleviate the negative effects of abiotic stressors, including heat stress. However, there is limited information on phytohormone-induced tolerance to abiotic stressors in seaweed. In the present study, the application of the major plant hormones abscisic acid and salicylic acid failed to mitigate the negative effects of heat stress on the marine red algaNeopyropia yezoensis, whereas 1-aminocyclopropane-1-carboxylic acid (ACC), the direct precursor of the plant hormone ethylene, regulates thermotolerance. In addition, the ACC analogs 1-aminocyclobutane-1-carboxylic acid and α-aminoisobutyric acid enhanced tolerance to heat stress. ACC increased the expression of genes involved in antioxidant defense systems to protect photosynthesis and respiration. These results suggest ACC acts as a phytohormone to mitigate the impact on heat stress independent of ethylene inN. yezoensis.