Nguyen Ngoc X B, Saithong Treenut, Boonyaritthongchai Panida, Buanong Mantana, Kalapanulak Saowalak, Wongs-Aree Chalermchai
Division of Postharvest Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand.
Bioinformatics and Systems Biology Program, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand; Center for Agricultural Systems Biology, Systems Biology and Bioinformatics Research Laboratory, Pilot Plant Development and Training Institute, King Mongkut's University of Technology, Thonburi, Bangkok 10150, Thailand.
J Plant Physiol. 2024 Dec;303:154356. doi: 10.1016/j.jplph.2024.154356. Epub 2024 Sep 18.
Salicylic acid (SA) and jasmonic acid (JA) are indispensable phytohormones whose interaction influences the ripening process in plants. Methyl salicylate (MeSA) and methyl jasmonate (MeJA) have been utilized to elevate the endogenous levels of SA and JA in horticultural products after harvest. However, their ability to preserve mango is uncertain. Individually and combined effects of exogenous MeSA and MeJA on mango ripening quality were investigated. 'Nam Dok Mai' mangoes were fumigated with MeSA, MeJA, and MeSA plus MeJA (MeSAJA) prior to storage for 6 d at 25 °C and 80-85% relative humidity (RH). Fruit ripening attributes, respiration rate, ethylene (ET) production, total phenolics (TP), and malondialdehyde (MDA) were assessed. Endogenous SA and JA levels were measured, as were the activities of lipoxygenase (LOX) and phenylalanine ammonia-lyase (PAL), and the expression of related genes MiPAL, MiICS, and MiLOX. Individual application of MeSA or MeJA preserved the mango quality by reducing ET production, respiration rate, and MDA levels while raising TP shortly after treatment. The ripening quality mirrored the induced SA and JA levels and correlated with the high expression of biosynthetic-related genes (MiPAL, MiICS, and MiLOX). Individual treatments stimulated SA and JA biosynthesis, demonstrating that these phytohormones are functionally connected and interdependent. When combined, MeSAJA caused a tradeoff response and distinct phenotypic outcomes compared to the individual treatments. As a result, MeSA fumigation is a practical method for preserving mango quality after harvest.
水杨酸（SA）和茉莉酸（JA）是不可或缺的植物激素，它们之间的相互作用会影响植物的成熟过程。水杨酸甲酯（MeSA）和茉莉酸甲酯（MeJA）已被用于提高园艺产品采后的SA和JA内源水平。然而，它们对芒果的保鲜能力尚不确定。本研究调查了外源MeSA和MeJA对芒果成熟品质的单独及联合作用。在25℃、相对湿度80 - 85%的条件下储存6天之前，用MeSA、MeJA以及MeSA加MeJA（MeSAJA）对“南投麦”芒果进行熏蒸处理。评估果实的成熟特性、呼吸速率、乙烯（ET）产量、总酚（TP）和丙二醛（MDA）含量。测定内源SA和JA水平，以及脂氧合酶（LOX）和苯丙氨酸解氨酶（PAL）的活性，还有相关基因MiPAL、MiICS和MiLOX的表达。单独施用MeSA或MeJA可通过降低ET产量、呼吸速率和MDA水平，同时在处理后不久提高TP含量来保持芒果品质。成熟品质反映了诱导的SA和JA水平，并与生物合成相关基因（MiPAL、MiICS和MiLOX）的高表达相关。单独处理刺激了SA和JA的生物合成，表明这些植物激素在功能上相互联系且相互依存。与单独处理相比，MeSAJA组合处理会引起权衡反应和不同的表型结果。因此，MeSA熏蒸是一种采后保持芒果品质的实用方法。
