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| 1 | Decoding altitude-activated regulatory mechanisms occurring during apple peel ripening显示文摘Apple(Malus domestica Borkh)is an important fruit crop cultivated in a broad range of environmental conditions.Apple fruit ripening is a physiological process,whose molecular regulatory network response to different environments is still not sufficiently investigated and this is particularly true of the peel tissue.In this study,the influence of environmental conditions associated with low(20 m)and high(750 m)altitude on peel tissue ripening was assessed by physiological measurements combined with metabolomic and proteomic analyses during apple fruit development and ripening.Although apple fruit ripening was itself not affected by the different environmental conditions,several key color parameters,such as redness and color index,were notably induced by high altitude.Consistent with this observation,increased levels of anthocyanin and other phenolic compounds,including cyanidin-3-O-galactoside,quercetin-3-O-rhamnoside,quercetin-3-O-rutinoside,and chlorogenic acid were identified in the peel of apple grown at high altitude.Moreover,the high-altitude environment was characterized by elevated abundance of various carbohydrates(e.g.,arabinose,xylose,and sucrose)but decreased levels of glutamic acid and several related proteins,such as glycine hydroxymethyltransferase and glutamate–glyoxylate aminotransferase.Other processes affected by high altitude were the TCA cycle,the synthesis of oxidative/defense enzymes,and the accumulation of photosynthetic proteins.From the obtained data we were able to construct a metabolite-protein network depicting the impact of altitude on peel ripening.The combined analyses presented here provide new insights into physiological processes linking apple peel ripening with the prevailing environmental conditions. | Evangelos Karagiannis Michail Michailidis Georgia Tanou Federico Scossa Eirini Sarrou George Stamatakis Martina Samiotaki Stefan Martens Alisdair R.Fernie Athanassios Molassiotis | 2020 | Horticulture Research2020，7，1： | 3 |
| 2 | 氮素改变辣椒初级代谢和薄壁组织厚度调控比叶面积研究显示文摘比叶面积(SLA)是影响植物光截获和光利用效率的关键性状,常常影响植物的生长和产量。SLA是解释不同植物在不同环境下生长差异的一个关键性状。光照和氮素供应都是决定SLA的重要因素。为了更好地了解辐照度和氮素对辣椒(Capsicum chinense)SLA的影响,研究对两个中国辣椒商品种(Biquinho和Habanero)的初级代谢产物和形态特征进行了分析。两种基因型辣椒的SLA随着遮阴而增加,但随氮供应量的增加而下降;在氮素供应由缺乏到充足的范围内Habanero品种的SLA表现稳定。相关分析表明,高氮供应导致SLA降低是因为氨基酸、蛋白质和淀粉含量的调节,从而影响叶片密度。此外,在中度缺氮到充足供氮范围内,两种基因型辣椒的SLA表现出响应差异,Biquinho和Habanero分别在栅栏和海绵状薄壁组织上表现出差异。总之,结果表明,SLA对氮供应的反应是由某些代谢物含量和依赖于基因型的影响叶片厚度及密度的薄壁组织变化平衡调节的。 | Lucas de ávila Silva Rebeca P.Omena-Garcia Jorge A.Condori-Apfata Paulo Mafra de Almeida Costa Natália Machado Silva Fábio M.Da Matta Agustin Zsogon Wagner L.Araújo Edgard A.de Toledo Picoli Ronan Sulpice Adriano Nunes-Nesi 沈凌峰 吉雪花(译) | 2021 | 辣椒杂志2021，，3： | 2 |
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