Effect of methyl jasmonate on cell wall modification of loquat fruit in relation to chilling injury after harvest
Effect of methyl jasmonate on cell wall modification of loquat fruit in relation to chilling injury after harvest
复制标题
茉莉酸甲酯对枇杷果实细胞壁修饰的影响与采后冷害的关系
DOI：
10.1016/j.foodchem.2009.05.047
复制
发表时间：
2010-02-01
期刊：
影响因子：
8.8
通讯作者：
Tang, Shuangshuang
中科院分区：
文献类型：
--
作者：
Cao, Shifeng;Zheng, Yonghua;Tang, Shuangshuang
以枇杷为试材，用10 μ M茉莉酸甲酯（MeJA）在20 ℃下处理24 h，然后在1 ℃下贮藏35 d，研究了MeJA处理对枇杷果实细胞壁结构的影响。枇杷果实在贮藏过程中发生冷害，表现为果实硬度增加，内部布朗宁，出汁率下降。这些冷害症状显着减少MeJA治疗。MeJA还显著延迟木质素、醇不溶残渣、半纤维素和纤维素的增加。同时，MeJA处理的果实在贮藏过程中苯丙氨酸解氨酶、过氧化物酶、多酚氧化酶活性显著低于对照，而多聚半乳糖醛酸酶活性显著高于对照。MeJA处理果实中水溶性和CDTA可溶性果胶的含量也显著高于对照。这些结果表明，MeJA在冷害的减少可能是由于抑制木质素积累和增强细胞壁多糖溶解。(C)2009爱思唯尔有限公司版权所有
Loquat fruit were pretreated with 10 mu M methyl jasmonate (MeJA) for 24 h at 20 degrees C, and then stored at 1 degrees C for 35 days to investigate the effect of MeJA treatment on cell wall modification in relation to chilling injury. Loquat fruit developed chilling injury, manifested as increased fruit firmness and internal browning, decreased extractable juice during storage. These chilling injury symptoms were significantly reduced by MeJA treatment. MeJA also markedly delayed the increases in lignin, alcohol insoluble residues, hemicellulose and cellulose. Meanwhile, the MeJA-treated fruit exhibited significantly lower activities of phenylalanine ammonia lyase, peroxidase, polyphenol oxidase and higher polygalacturonase activity than the control during storage. The levels of water- and CDTA-soluble pectins in MeJA-treated fruit were also significantly higher than that in the control. These results suggest that the reduction in chilling injury by MeJA may be due to inhibited lignin accumulation and enhanced cell wall polysaccharides solubilisation. (C) 2009 Elsevier Ltd. All rights reserved