期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 64, 期 29, 页码 5855-5865出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b00947
关键词
strawberry; beta-aminobutyric acid; induced resistance; direct; priming; sucrose metabolism
资金
- National Natural Science Foundation of China [31201440]
- China Postdoctoral Science Foundation Funded Project [2014M552300]
- Natural Science Foundation Project of CQ CSTC [cstc2015jcyjA80028]
- Scientific Research Innovation Team Project of Chongqing Three Gorges University [201302]
- Funding Project for Second Young Key Teachers in the Universities of Chongqing City [2014046]
The specific forms of disease resistance induced by beta-aminobutyric acid (BABA) and their impacts on sucrose metabolism of postharvest strawberries were determined in the present research. Treatment with 10-500 mmol L-1 BABA inhibited the Botrytis cinerea infection, possibly directly by suppressing the fungus growth and indirectly by triggering disease resistance. Moreover, BABA-induced resistance against B. cinerea infection in strawberries was associated with either one of two mechanisms, depending upon the concentration used: BABA at concentrations higher than 100 mmol L-1 directly induced the defense response, including a H2O2 burst, modulation of the expression of PR genes, including FaPR1, FaChi3, Fa beta glu, and FaPAL, and increased activities of chitinase, beta-1,3-glucanase, and PAL, whereas BABA at 10 mmol L-1 activated a priming response because the BABA-treated fruits exhibited an increased capacity to express molecular defense only when the fruits were inoculated with B. cinerea. Activation of the priming defense appeared almost as effective against B. cinerea as inducing direct defense. However, the primed strawberries maintained higher activities of SS synthesis and SPS and SPP enzymes) and lower level of SS cleavage during the incubation; these activities contributed to higher sucrose, fructose, and glucose contents, sweetness index, and sensory scores compared to fruits exhibiting the direct defense. Thus, it is plausible that the priming defense, which can be activated by BABA at relatively low concentrations, represents an optimal strategy for combining the advantages of enhanced disease protection and soluble sugar accumulation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据