Relationship between changes in endogenous polyamines and seed quality during development of sh2 sweet corn (Zea mays L.) seed
Relationship between changes in endogenous polyamines and seed quality during development of sh2 sweet corn (Zea mays L.) seed
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DOI：
10.1016/j.scienta.2009.10.006
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发表时间：
2010-01-04
影响因子：
4.3
通讯作者：
Knapp, A.
中科院分区：
文献类型：
--
作者：
Cao, D. D.;Hu, J.;Knapp, A.
多胺影响植物对非生物胁迫的耐受性，并被认为在器官发生中起重要作用。本试验研究了多胺与种子品质的关系。因此，比较了甜玉米（sh（2））F1代种子发育过程中游离腐胺（Put）、亚精胺（Spd）和精胺（Spm）含量及生理生化指标的变化。Put、Spd和Spm的含量在授粉后14 ~ 30 d呈上升趋势。30 DAP后Put浓度下降趋势与Spd和Spm相反。以发芽率、发芽势、发芽指数、种子大小、种子干鲜重、可溶性总糖、可溶性总蛋白、丙二醛（MDA）含量、电解质渗漏率、过氧化物酶（POD）和过氧化氢酶（CAT）活性等生理生化指标为指标，对多胺与种子品质进行了回归分析。Spd与种子发育过程中的综合生理变化关系较Put和Spm密切。此外，在种子成熟期，Spm浓度可能比Spd和Put更适合于预测种子发芽力。说明内源游离态Spd和Spm在甜玉米种子发育过程中的作用大于Put。(C)2009爱思唯尔有限公司版权所有。
Polyamines putatively affect tolerance to abiotic stresses and are believed to be important in organogenesis. Present experiments investigate the relationship between polyamines (PAs) and seed quality. Therefore, during seed development, the changes in free putrescine (Put), spermidine (Spd) and spermine (Spm) and physiological and biochemical parameters in F-1 seeds of sh(2) sweet corn were compared. Concentrations of Put, Spd and Spm increased from 14 to 30 days after pollination (DAP). After 30 DAP Put concentration declined with an opposite trend to that of Spd and Spm. The regression analysis between PAs and seed quality described by physiological and biochemical parameters including germination percentage, germination energy, germination index, seed size, seed fresh and dry weight, total soluble sugar, total soluble protein, Maiondialdehyde (MDA) concentration, electrolyte leakage, peroxidase (POD) and catalase (CAT) activity were conducted. Spd was observed to have a closer relation with the comprehensive physiological changes of seeds during their development than that of Put and Spm. Moreover, the Spm concentration might be more suitable to forecast seed germinability during seed maturation period than Spd and Put. It indicated that endogenous Spd and Spm in dissociated form had more effect than Put during seed development progress of sweet corn. (C) 2009 Elsevier B.V. All rights reserved.