The Relationship between Polyamines and Hormones in the Regulation of Wheat Grain Filling
The Relationship between Polyamines and Hormones in the Regulation of Wheat Grain Filling
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多胺与激素在小麦籽粒灌浆调控中的关系
DOI：
10.1371/journal.pone.0078196
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发表时间：
2013-10-29
期刊：
影响因子：
3.7
通讯作者：
Liao, Yuncheng
中科院分区：
文献类型：
--
作者：
Liu, Yang;Gu, Dandan;Liao, Yuncheng
灌浆对小麦粒重有很大的影响。多胺（PA）参与调节植物生长。但PA对小麦籽粒灌浆的影响及其作用机制尚不清楚。本研究旨在探讨多胺与激素在小麦籽粒灌浆调控中的关系。外源施精脒（Spd）、精胺（Spm）和腐胺（Put）3种多胺处理，研究了水稻籽粒灌浆特性及内源多胺和内源激素的变化。吲哚乙酸（IAA）、玉米素（Z）+玉米素核苷（ZR）、脱落酸（阿坝）、乙烯（ETH）和赤霉素1+4（GAs）在小麦灌浆过程中的变化。外源Spd和Spm显著提高了籽粒灌浆速率和粒重，而外源Put对这些措施的影响不显著。外源Spd和Spm显著提高了籽粒内源Spd、Spm、Z+ZR、阿坝和IAA含量，显著降低了ETH的释放。小麦籽粒内源Spd、Spm和Z+ZR含量与灌浆速率和粒重呈显著正相关，内源ETH含量与灌浆速率和粒重呈显著负相关。根据这些结果，我们认为多胺参与了调节小麦籽粒灌浆的激素平衡。
The grain weight of wheat is strongly influenced by filling. Polyamines (PA) are involved in regulating plant growth. However, the effects of PA on wheat grain filling and its mechanism of action are unclear. The objective of the present study was to investigate the relationship between PAs and hormones in the regulation of wheat grain filling. Three PAs, spermidine (Spd), spermine (Spm), and putrescine (Put), were exogenously applied, and the grain filling characteristics and changes in endogenous PA and hormones, i.e., indole-3-acetic acid (IAA), zeatin (Z) + zeatin riboside (ZR), abscisic acid (ABA), ethylene (ETH) and gibberellin 1+4 (GAs), were quantified during wheat grain filling. Exogenous applications of Spd and Spm significantly increased the grain filling rate and weight, but exogenous Put had no significant effects on these measures. Exogenous Spd and Spm significantly increased the endogenous Spd, Spm, Z+ZR, ABA, and IAA contents and significantly decreased ETH evolution in grains. The endogenous Spd, Spm and Z+ZR contents were positively and significantly correlated with the grain filling rate and weight of wheat, and the endogenous ETH evolution was negatively and significantly correlated with the wheat grain filling rate and weight. Based upon these results, we concluded that PAs were involved in the balance of hormones that regulated the grain filling of wheat.