[1]文廷刚,王伟中,杨文飞,等.水稻穗分化期外源植物生长调节剂处理对颖花分化与退化的影响[J].江苏农业学报,2019,(03):514-522.[doi:doi:10.3969/j.issn.1000-4440.2019.03.003]
　WEN Ting-gang,WANG Wei- zhong,YANG Wen-fei,et al.Effects of exogenous plant growth regulator treatments on rice spikelet differentiation and degeneration during panicle initiation stage[J].,2019,(03):514-522.[doi:doi:10.3969/j.issn.1000-4440.2019.03.003]
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水稻穗分化期外源植物生长调节剂处理对颖花分化与退化的影响()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年03期
页码:
514-522
栏目:
遗传育种·生理生化
出版日期:
2019-06-30

文章信息/Info

Title:
Effects of exogenous plant growth regulator treatments on rice spikelet differentiation and degeneration during panicle initiation stage
作者:
文廷刚1; 2; 王伟中1; 杨文飞1; 顾大路1; 钱新民2; 施洪泉1; 孙爱侠1; 吴传万1; 2
（1. 江苏徐淮地区淮阴农业科学研究所，江苏 淮安 223001；2.江苏省植物生长调节剂工程技术研究中心，江苏 淮安 223001）
Author(s):
WEN Ting-gang1; 2; WANG Wei-zhong1; YANG Wen-fei1; GU Da-lu1; QIAN Xin-min2; SHI Hong-quan1; SUN Ai-xia1; WU Chuan-wan1; 2
(1.Huaiyin Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Huai’an 223001, China;2.Jiangsu Engineering and Technology Research Center for Plant Growth Regulators, Huai’an 223001, China)
关键词:
水稻; 植物生长调节剂; 穗分化期; 颖花分化与退化; 结实率
Keywords:
rice; plant growth regulator; panicle differentiation stage; spikelet differentiation and degeneration; seed setting rate
分类号:
S511
DOI:
doi:10.3969/j.issn.1000-4440.2019.03.003
文献标志码:
A
摘要:
以南粳9108为材料，在水稻生长的第一苞分化期（Ⅰ期）、枝梗及颖花分化期（Ⅱ期）、颖花分化雌雄蕊形成期（Ⅲ期）、雌雄蕊形成减数分裂期（Ⅳ期）喷施乙烯利（Eth, 10×10-3 mol/L）和多效唑（PP333，300 mg/L），以清水为对照（CK），研究不同时期外源调节剂处理对稻穗一次枝梗颖花和二次枝梗颖花的分化、退化以及穗部性状和产量构成的影响。结果表明，乙烯利在幼穗分化各时期处理均显著增加了水稻总颖花分化数和退化数，但每穗颖花数均表现为降低，尤以Ⅳ期每穗颖花数降低最多，其中主要降低了二次枝梗颖花数。多效唑在幼穗分化前期（Ⅰ和Ⅱ期）处理总颖花分化数、总颖花退化数和每穗颖花数均表现为增加；而在后期（Ⅲ和Ⅳ期）处理则相反。相关性分析结果显示，水稻结实率和实粒数与二次枝梗颖花数关系更紧密，而总颖花数和千粒质量与一次枝梗颖花数关系更紧密。方差分析结果显示，不同时期处理和调节剂处理以及不同时期处理与调节剂处理的交互作用对水稻穗部性状的影响均达到显著水平。因此，乙烯利处理通过减少一次枝梗颖花数和二次枝梗颖花数，从而降低了每穗颖花数和实粒数，空秕粒数增加，导致了结实率、千粒质量和产量的下降。多效唑前期（Ⅰ和Ⅱ期）处理通过提升一次枝梗颖花数和二次枝梗颖花数，促进了每穗颖花数的增加，从而提高了实粒数、结实率和千粒质量，最终提高了产量；但在后期（Ⅲ和Ⅳ期）处理则相反。
Abstract:
Nanjing 9108 was adopted as the rice material to investigate the effects of different plant growth regulator treactments on spikelet differentiation and degeneration for primary and second branch, as well as panicle traits and yield components in rice, which was treated at four different growth periods as follows: bud differentiation (Ⅰ), branch and floret differentiation stage (Ⅱ), spikelet differentiation to pistilstamen formation stage (Ⅲ), pistilstamen formation to pollen meiosis stage (Ⅳ) when ethephon (Eth,10×10-3 mol/L), paclobutrazol (PP333, 300 mg/L) and water (CK) were applied. The results showed that Eth significantly increased the total spikelet differentiation and degeneration in all stages during panicle initiation, and significantly reduced the number of spikelet per panicle, particularly at stages Ⅳ, which decreased the spikelet mainly in secondary branches. PP333 increased the total differentiation and degradation spikelet number as well as the spikelet per panicle when applied at the early stage (ⅠandⅡ). On the contrary, the results were the opposite when PP333 applied at the late stage (Ⅲ and Ⅳ). The correlation analysis results showed that the seed setting rate and grain number of rice were more closely related to the number of spikelet in secondary branches, while the total spikelet number and 1000grain weight were more closely related to the number of spikelet in primary branches. The variance analysis results showed that the effects of different period treatments and regulator treatments as well as their interaction on the panicle traits of rice reached significant levels. Therefore, Eth decreased the spikelet per panicle and grain number by reducing the number of primary and secondary branches, and increased the number of sterile grains, resulting in a decrease in seed setting rate, 1000grain weight and yield. PP333 promoted the increase of spikelet per panicle by increasing the number of primary and secondary branches at the early stage (ⅠandⅡ), thereby increasing the grain number, seed setting rate and 1000grain weight, and ultimately increasing the yield; but when PP333 was applied at the late stage (Ⅲ and Ⅳ), the opposite results were obtained.

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备注/Memo

备注/Memo:
收稿日期：2018-12-12 基金项目：淮安市农业科学院院长科研基金项目（HNY201706和HNY201707）；江苏省“六大人才高峰”高层次人才项目（NY-161） 作者简介：文廷刚（1983-），男，重庆人，硕士，副研究员，主要从事作物栽培与调控。（E-mail）wentinggang@126.com 通讯作者：杨文飞，（Tel）13952383328@139.com
更新日期/Last Update: 2019-06-30