The xylem of rice (Oryza sativa) is colonized by Azorhizobium caulinodans
The xylem of rice (Oryza sativa) is colonized by Azorhizobium caulinodans
复制标题
DOI：
10.1098/rspb.2000.0973
复制
发表时间：
2000-01-22
影响因子：
4.7
通讯作者：
Cocking, EC
中科院分区：
文献类型：
--
作者：
Gopalaswamy, G;Kannaiyan, S;Cocking, EC
接种固氮菌ORS571(PXLGD4)后，黄酮柚皮苷元促进了水稻侧根的发育和细菌对侧根裂隙的定植。将携带LacZ报告基因的ORS571(PXLGD4)接种到无菌生长的水稻幼苗中。通过对接种水稻根部切片的显微分析，证实了根部木质部可被固氮固氮菌侵染。我们讨论了固氮菌对水稻根部木质部的这种定殖是否为内生固氮提供了合适的生态位。
Following inoculation with Azorhizobium caulinodans ORS571(pXLGD4), lateral root development of rice and colonization of lateral root cracks by bacteria were shown to be stimulated by the flavonoid naringenin. Rice seedlings growing aseptically in the presence of naringenin were inoculated with ORS571(pXLGD4), carrying the lacZ reporter gene. By microscopic analysis of sections of inoculated rice roots, it has been demonstrated that the xylem of rice roots can be colonized by Azorhizobium caulinodans. We discuss whether this colonization of the xylem of rice roots by azorhizobia could provide a suitable niche for endophytic nitrogen fixation.