Morpho-physiological traits of sugar beet exposed to salt stress

文献类型： 外文期刊

第一作者： Stevanato, Piergiorgio

作者： Stevanato, Piergiorgio;Cacco, Giovanni;Gui, Geng;Biancardi, Enrico;Abenavoli, Maria Rosa;Roman, Alessandro;Sorgona, Agostino

作者机构：

关键词： sugar beet;salt stress;root morphology;antioxidants;H~+-ATPase;PCA

期刊名称：INTERNATIONAL SUGAR JOURNAL （ 影响因子：0.077； 五年影响因子：0.125 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Selection of traits increasing salt (NaCI) tolerance would improve the cultivation of sugar beet [Beta vulgaris L. subsp. vulgaris) in salty soils, by reducing or avoiding the usually linked losses in sugar yield and processing quality. This study analysed some adaptive morpho-physiological mechanisms in genotypes grown under controlled conditions in different salt concentrations. Parents and F1 hybrids obtained from a diallel cross were analysed for: i) mid-parent heterosis of root; ii) root length and its morphological components; and iii) length and dry weight of shoot (leaf + stem). Physiological traits such as: i) antioxidant enzyme activities in leaves; ii) root plasma membrane (pm) H~+-ATPase activity; iii) leaf relative water content; and iv) shoot Na/K ratio, were also investigated. Through principal component analysis (PCA), it was possible to group the single morpho-physiological traits. This permitted discrimination of hybrids in relation to their response to salinity. The hybrid Hy-1 in presence of medium salt concentration performed well in terms of root morphology and enzyme activities, which were linked to the cell growth process. These findings evince a better understanding of the salt tolerance mechanisms in sugar beet and the identification of useful physio-biochemical traits useful for sugar beet breeding.

分类号： TS24

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