Effects of ethylene and 1-methylcyclopropene (1-MCP) on lignification of postharvest bamboo shoot
Effects of ethylene and 1-methylcyclopropene (1-MCP) on lignification of postharvest bamboo shoot
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DOI：
10.1016/j.foodchem.2007.04.007
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发表时间：
2007-01-01
期刊：
影响因子：
8.8
通讯作者：
Yan, Mang
中科院分区：
文献类型：
--
作者：
Luo, Zisheng;Xu, Xiaoling;Yan, Mang
研究了1-甲基环丙烯(1-MCP)和乙烯对雷竹采后品质和木质化的影响。结果表明，对照竹笋发病率和呼吸强度增加，总糖含量迅速下降。还原糖含量和乙烯释放量呈先升后降的趋势。采收后新梢硬度的增加与木质素和纤维素含量的增加呈正相关。果肉组织中木质素的积累与苯丙氨酸解氨酶(PAL)、肉桂醇脱氢酶(CAD)和过氧化物酶(POD)活性呈正相关。乙烯处理提高了果实硬度、呼吸强度和乙烯释放量，促进了TS的下降，但延缓了病害的发生。1-MCP处理导致果实硬度降低，发病率和TS含量升高，呼吸强度和乙烯释放量降低，PAL、CAD和POD活性延缓，木质素和纤维素积累延缓。本研究结果表明，1-MCP参与了竹笋木质化过程，1-MCP可用于控制竹笋这一重要的采后生理障碍。(C)2007爱思唯尔有限公司。保留所有权利。
The effects of 1-methylcyclopropene (1-MCP) and ethylene on quality and lignification of postharvest bamboo shoot (Phyllostachys praecox f. prevernalis.), were examined during storage at 20 degrees C. Disease incidence and respiration rate of control bamboo shoot increased, while total sugar (TS) content decreased quickly. Reducing sugar (RS) content and ethylene production increased at first and then decreased quickly. Increased shoot firmness after harvest was positively correlated with higher lignin and cellulose contents. Accumulation of lignin in flesh tissue was also positively correlated with activities of phenylalanine ammonia lyase (PAL), cinnamyl alcohol dehydrogenase (CAD) and peroxidase (POD). Ethylene treatment enhanced firmness, respiration rate and ethylene production increase, promoted TS decrease, but retarded disease incidence. 1-MCP treatment resulted in lower firmness, higher disease incidence and TS content, inhibited respiration rate and ethylene production, delayed the activities of PAL, CAD and POD, and retarded lignin and cellulose accumulation. The present findings show that ethylene is involved in bamboo shoot lignification, and suggest that 1-MCP could be used commercially to control this important postharvest physiological disorder in bamboo shoot. (c) 2007 Elsevier Ltd. All rights reserved.