Abstract

Fleshy fruits are very varied, whether in terms of their composition, physiology, or rate and duration of growth. To understand the mechanisms that link metabolism to phenotypes, which would help the targeting of breeding strategies, we compared eight fleshy fruit species during development and ripening. Three herbaceous (eggplant, pepper, and cucumber), three tree (apple, peach, and clementine) and two vine (kiwifruit and grape) species were selected for their diversity. Fruit fresh weight and biomass composition, including the major soluble and insoluble components, were determined throughout fruit development and ripening. Best-fitting models of fruit weight were used to estimate relative growth rate (RGR), which was significantly correlated with several biomass components, especially protein content (R=84), stearate (R=0.72), palmitate (R=0.72), and lignocerate (R=0.68). The strong link between biomass composition and RGR was further evidenced by generalized linear models that predicted RGR with R-values exceeding 0.9. Comparison of the fruit also showed that climacteric fruit (apple, peach, kiwifruit) contained more non-cellulosic cell-wall glucose and fucose, and more starch, than non-climacteric fruit. The rate of starch net accumulation was also higher in climacteric fruit. These results suggest that the way biomass is constructed has a major influence on performance, especially growth rate.

中文翻译：

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生物量成分解释了果实的相对生长速度并区分了跃变型和非跃变型物种。

 抽象的

肉质水果无论是在成分、生理学还是生长速度和持续时间方面都有很大差异。为了了解代谢与表型之间的联系机制，这将有助于确定育种策略的目标，我们比较了八种肉质水果品种在发育和成熟过程中的情况。因其多样性而选择了三种草本植物（茄子、胡椒和黄瓜）、三种树木（苹果、桃子和克莱门氏小柑橘）和两种藤本植物（猕猴桃和葡萄）。果实鲜重和生物量组成，包括主要的可溶性和不溶性成分，在果实发育和成熟的整个过程中测定。使用果实重量的最佳拟合模型来估计相对生长率（RGR），其与多种生物量成分显着相关，特别是蛋白质含量（ R = 84）、硬脂酸（ R = 0.72）、棕榈酸（ R = 0.72）、和 ligocerate ( R =0.68)。广义线性模型进一步证明了生物量组成与 RGR 之间的密切联系，该模型预测 RGR 的R值超过 0.9。对水果的比较还表明，更年期水果（苹果、桃子、猕猴桃）比非更年期水果含有更多的非纤维素细胞壁葡萄糖和岩藻糖以及更多的淀粉。更年期果实的淀粉净积累率也较高。这些结果表明，生物质的构建方式对性能有重大影响，尤其是生长速度。