Studies on the Change of Root Morphology of Rice Inoculated With Rhizobium
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摘要: 水稻(Oryza sative)接种根瘤菌后2～3d,在显微镜下观察,水稻根表面和根毛上开始有根瘤菌吸附,根毛产生变形,末端膨大、微弯;接后4～7d,粘附在根表和根毛上的根瘤菌密度加大,且不同水稻品种对根瘤菌的吸附情况有所不同。接后7～14d,根毛形成弯曲,大多数弯曲90°～180°,少数根毛弯曲180°～360°,个别根毛产生分枝。不同水稻品种对接种根瘤菌产生的根毛变形和弯曲的效应也有所差异。水稻接种根瘤菌后35～45d,根部形成短化、膨大的次生根瘤状结构。13种稻/菌组合次生根瘤状结构的形成,表明这种瘤状结构的产生频率与稻/菌组合有密切关系。Abstract: Different geno type of rice varieties(Oryza sativa)have been studied on rice rhizo biainter actio ns ino culated with Rhizo bium str ains resulting in the change of root morphology.Microsco pic analysis showed that root hair deformation and curling of rice seedlings star ted from inoculation after 7 days.Most of root hair scurling were about 90皌o 180?,a few root hairs for med 180? to 360癱urling,shorter and thicker lateral root no dular structures for med from inoculation after 35 to 45 days.The frequency of the nodular structure for mation was closely related to the conbination of rice varieties and Rhizo hium strains.
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Key words:
- Rice /
- Rhizobium /
- Root hair defor mation and curling /
- Lateral root nodular structure
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[1] 〔4〕Callaham D A,T orrey J C.The structural basis for infection of root hairs of T rifolium repens by Rhizobium.Can J Bot.1981,59:1647-1664 [2] 〔6〕黄世贞,Djordjevic M A,Rolfe B C.豌豆根瘤菌转移接合子侵染的白三叶草根部形态特征研究.植物学报,1992,34(2):107～113 [3] 〔10〕黄世贞,林妙灵,丁武.诱导根瘤菌与稻类结瘤共生的探索研究.福建省农科院学报,1992,7(1):23～29 -
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