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Relationship Between Allelopathic Effects and Functional Traits of Different Allelopathic Potential Rice Accessions at Different Growth Stages

文献类型： 外文期刊

作者： Xu Gaofeng 1 ; Shen Shicai 1 ; Zhang Fudou 1 ; Zhang Yun 2 ; Hisashi, Kato-Noguchi 3 ; David, Roy Clements 4 ;

作者机构： 1.Yunnan Acad Agr Sci, Inst Agr Environm & Resources Res, Kunming 650205, Yunnan, Peoples R China

2.Yunnan Acad Agr Sci, Food Crops Res Inst, Kunming 650205, Yunnan, Peoples R China

3.Kagawa Univ, Fac Agr, Dept Appl Sci, Miki, Kagawa 7610795, Japan

4.Trinity Western Univ, Dept Biol, 7600 Glover Rd, Langley, BC V2Y 1Y1, Canada

关键词： rice;allelopathy;environment change;functional trait;specific leaf area;stem mass fraction;temperature-light interaction

期刊名称：RICE SCIENCE （ 影响因子：3.333； 五年影响因子：4.226 ）

ISSN： 1672-6308

年卷期： 2018 年 25 卷 1 期

页码：

收录情况： SCI

摘要： In this study, effects of temperature, light and their interactions on allelopathic effects and the functional traits specific leaf area (SLA) and stem mass fraction (SMF) of different allelopathic potential rice accessions at different growth stages were analyzed. The main results were as follows: Allelopathic responses to temperature and light varied with different allelopathic potential rice accessions at different growth stages. With the rise of temperature and the extension of photoperiod, allelopathic effect increased firstly and then decreased at 2-3 leaf stage, but increased constantly at the 4-5 and 7-8 leaf stages in strong allelopathic rice accessions [O. longistaminata, F-1 (O. longistaminata x RD23), F-2 (RL159 and RL169)]. Temperature had significant impact on allelopathic effect without considering light factors, but light showed little effect on rice allelopathy at the same temperature conditions. The greatest allelopathic effect was attained with moderate temperature and long photoperiod at 2-3 leaf stage in strong allelopathic rice accessions, but all the rice accessions showed weak allelopathic effects at the low temperature condition (15 degrees C/10 degrees C), and the influence of different factors on allelopathy followed a general trend as temperature > leaf stage > light, indicating that among the multiple factors impacting rice allelopathy, temperature was the main factor. Allelopathic characteristics of F-1 and F-2 to various temperature and light were similar to O. longistaminata, showing that allelopathic genes from wild rice can be expressed in its descendants. Temperature and light also had significant effects on SLA and SMF, and rice allelopathy was closely correlative to SLA in strong allelopathic rice accessions at the 4-5 and 7-8 leaf stages, but there was no correlation between rice allelopathy and SMF at different growth stages. These results suggested that rice adjust the relationship between allelopathy and SLA and adapt to the varied environments, and that high temperature and long photoperiod can enhance rice allelopathic activity.

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