Chemical, Morphological, and Phenological Traits of Blueberry Cultivars Predict Susceptibility to A Pollinator-Vectored Fungal Pathogen.

IF 2.2 3区 环境科学与生态学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY
Seanne R Clemente, Lynn S Adler, Juha-Pekka Salminen, Marica T Engström, Nicolas Baert, Scott H McArt
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Abstract

Several crops are threatened by pollinator-vectored plant pathogens, which can reduce fruit yield and quality. Domestication has frequently increased crop susceptibility to plant pathogens, but significant cultivar variation in resistance typically exists. While it is well known that floral traits can shape plant-pollinator-pathogen interactions in natural and managed systems, little is known regarding how morphological, phenological, and chemical traits combine to shape resistance in domesticated plant species. Here, we address this topic by (1) conducting a common garden field experiment where we measured percent of tissues infected by the fungal pathogen Monilinia vaccini-corymbosii in 14 cultivars of highbush blueberries (Vaccinium spp.) and (2) using a three-pronged multivariate approach of PCA, random forest, and LASSO regressions to single out predictors of cultivar resistance from a suite of phenological, morphological, and chemical (oxidatively active phenolics) traits collected from the field. Leaf and floral traits varied between cultivars, and we found that concentrations of phenolics (chlorogenic acid and total phenolics) in leaves were strong predictors of cultivar resistance to the primary infection stage of M. vaccini-corymbosii, while floral phenology and carpel phenolics (procyanidin-containing proanthocyanidins and quercetin derivatives) predicted resistance to the secondary infection stage. Our findings highlight that intraspecific variation in chemical and phenological traits as a result of breeding can shape plant-pollinator-pathogen dynamics. This information could be used in future trait-based breeding efforts to increase resistance to disease.

蓝莓品种的化学、形态和物候特征预测对传粉媒介真菌病原体的易感性。
一些作物受到传粉媒介植物病原体的威胁,这可以降低果实的产量和质量。驯化通常会增加作物对植物病原体的敏感性,但抗性通常存在显著的品种差异。虽然众所周知,在自然和人工管理系统中,花性状可以影响植物-传粉者-病原体的相互作用,但关于形态、物候和化学性状如何结合起来影响驯化植物物种的抗性,我们知之甚少。在这里,我们通过(1)进行了一个普通的花园田间试验,测量了14个高丛蓝莓(Vaccinium spp.)品种的真菌病原体牛痘-冠状杆菌感染的组织百分比;(2)使用PCA、随机森林和LASSO回归的三管齐下的多变量方法,从一套物候、形态、以及田间收集的化学(氧化活性酚类)性状。叶片和花性状在不同品种之间存在差异,叶片中酚类物质(绿原酸和总酚类物质)的浓度是品种对牛痘-冠状孢杆菌初级侵染期抗性的强预测因子,而花物候和心皮酚类物质(含原花青素的原花青素和槲皮素衍生物)可以预测品种对继发侵染期的抗性。我们的研究结果强调,由于育种的结果,种内化学和物候性状的变化可以塑造植物-传粉者-病原体的动态。这些信息可用于未来基于性状的育种工作,以增强对疾病的抵抗力。
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来源期刊
Journal of Chemical Ecology
Journal of Chemical Ecology 环境科学-生化与分子生物学
CiteScore
5.10
自引率
4.30%
发文量
58
审稿时长
4 months
期刊介绍: Journal of Chemical Ecology is devoted to promoting an ecological understanding of the origin, function, and significance of natural chemicals that mediate interactions within and between organisms. Such relationships, often adaptively important, comprise the oldest of communication systems in terrestrial and aquatic environments. With recent advances in methodology for elucidating structures of the chemical compounds involved, a strong interdisciplinary association has developed between chemists and biologists which should accelerate understanding of these interactions in nature. Scientific contributions, including review articles, are welcome from either members or nonmembers of the International Society of Chemical Ecology. Manuscripts must be in English and may include original research in biological and/or chemical aspects of chemical ecology. They may include substantive observations of interactions in nature, the elucidation of the chemical compounds involved, the mechanisms of their production and reception, and the translation of such basic information into survey and control protocols. Sufficient biological and chemical detail should be given to substantiate conclusions and to permit results to be evaluated and reproduced.
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