Department of Plant Sciences, University of California, Davis Davis, CA, USA ; Department of Viticulture and Enology, University of California, Davis Davis, CA, USA.
Front Plant Sci. 2013 May 14;4:142. doi: 10.3389/fpls.2013.00142. eCollection 2013.
Fruit-pathogen interactions are a valuable biological system to study the role of plant development in the transition from resistance to susceptibility. In general, unripe fruit are resistant to pathogen infection but become increasingly more susceptible as they ripen. During ripening, fruit undergo significant physiological and biochemical changes that are coordinated by complex regulatory and hormonal signaling networks. The interplay between multiple plant stress hormones in the interaction between plant vegetative tissues and microbial pathogens has been documented extensively, but the relevance of these hormones during infections of fruit is unclear. In this work, we analyzed a transcriptome study of tomato fruit infected with Botrytis cinerea in order to profile the expression of genes for the biosynthesis, modification and signal transduction of ethylene (ET), salicylic acid (SA), jasmonic acid (JA), and abscisic acid (ABA), hormones that may be not only involved in ripening, but also in fruit interactions with pathogens. The changes in relative expression of key genes during infection and assays of susceptibility of fruit with impaired synthesis or perception of these hormones were used to formulate hypotheses regarding the involvement of these regulators in the outcome of the tomato fruit-B. cinerea interaction.
果实-病原体相互作用是一个有价值的生物学系统，可用于研究植物发育在抗性向易感性转变中的作用。一般来说，未成熟的果实对病原体感染具有抗性，但随着果实成熟，其易感性逐渐增加。在成熟过程中，果实经历了由复杂的调控和激素信号网络协调的显著的生理和生化变化。植物应激激素在植物营养组织和微生物病原体之间相互作用中的相互作用已经被广泛记录，但这些激素在果实感染过程中的相关性尚不清楚。在这项工作中，我们分析了番茄果实感染 Botrytis cinerea 的转录组研究，以分析乙烯（ET）、水杨酸（SA）、茉莉酸（JA）和脱落酸（ABA）生物合成、修饰和信号转导基因的表达谱，这些激素不仅可能参与成熟过程，而且还可能参与果实与病原体的相互作用。利用感染过程中关键基因的相对表达变化和这些激素合成或感知受损的果实易感性测定，提出了这些调节剂参与番茄果实-B. cinerea 相互作用结果的假说。
