The chemical cross talk between rice and barnyardgrass
The chemical cross talk between rice and barnyardgrass
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DOI：
10.4161/psb.6.8.15869
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发表时间：
2011-08
影响因子：
2.9
通讯作者：
H. Kato‐Noguchi
中科院分区：
文献类型：
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作者：
H. Kato‐Noguchi
研究了水稻种植中最有害的杂草之一稗子与水稻之间的化学互扰。禾草幼苗或禾草根渗出液的存在增加了水稻的化感作用。禾草幼苗或禾草根系分泌物的存在也增加了水稻化感物质、水稻幼苗中莫内酯B的浓度和水稻分泌莫内酯B的水平。由于莫内酯B具有较强的生长抑制活性并具有化感化学作用，稗草诱导的水稻化感作用可能是由于莫内酯B分泌增加所致。这些结果表明，水稻可能通过感知稗草根部分泌物中的化学成分对邻近稗草的存在做出反应，并通过提高莫内酯b的产生和分泌水平来增加化感活性。化感作用可能是水稻与稗草相互作用的诱导防御机制之一，诱导化感作用可能通过抑制稗草的生长为水稻提供竞争优势。
The chemical cross talk between rice and barnyardgrass which is one of the most noxious weeds in rice cultivation was investigated. Allelopathic activity of rice was increased by the presence of barnyardgrass seedlings or barnyardgrass root exudates. Rice allelochemical, mo-milactone B, concentration in rice seedlings and momilactone B secretion level from rice were also increased by the presence of barnyardgrass seedlings or barnyardgrass root exudates. As momilactone B possesses strong growth inhibitory activity and acts as an allelochemical, barnyardgrass-induced rice allelopathy may be due to the increased momilactone B secretion. These results suggest that rice may response to the presence of neighboring barnyardgrass by sensing the chemical components in barnyardgrass root exudates and increase allelopathic ac-tivity by elevated production and secretion levels of momilactone B. Thus, rice allelopathy may be one of the inducible defense mechanisms by chemical-mediated plant interaction be-tween rice and barnyardgrass and the induced-allelopathy may provide a competitive advan-tage for rice through suppression of the growth of barnyardgrass.