Xiao Jian, Chen Si-Yu, Sun Yan, Yang Shang-Dong, He Yi
Guangxi Key Laboratory of Subtropical Bio-resource Conservation and Utilization, Agricultural College, Guangxi University, Nanning, 530004, Guangxi, People's Republic of China.
Horticultural Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, 530007, Guangxi, People's Republic of China.
Sci Rep. 2022 Apr 15;12(1):6360. doi: 10.1038/s41598-022-10533-0.
To elucidate the biological mechanism of yellow rind formation on watermelon, the characteristics of soil bacterial community structure in rhizosphere and endophytic bacteria in stem of yellow rind watermelon were analyzed. Based on high-throughput sequencing technology, plant stem and rhizosphere soil samples, which collected from yellow and green rind watermelons were used in this paper, respectively. The structural characteristics of the endophytic bacteria in stems and soil bacterial communities in rhizospheres of yellow and green rind watermelons were comparative studied. Firstly, significant different proportions of some dominant bacteria and abundances could be detected between yellow and rind watermelons. Meanwhile, although different abundances of endophytic bacteria could be found, but no significant differences were observed between yellow and green rind watermelons. Moreover, Gemmatimonadota, Myxococcota, WPS-2, norank_f_Gemmatimonadaceae and Bradyrhizobium were the soil dominant bacterial genera in rhizosphere of green rind watermelon. All above results suggest that differences of rhizospheric and endophytic bacteria are exactly recruited as "workers" by different watermelon phenotypes relating to rind color formations.
为阐明西瓜黄皮形成的生物学机制，分析了黄皮西瓜根际土壤细菌群落结构特征及茎部内生细菌特征。基于高通量测序技术，本文分别采集了黄皮西瓜和绿皮西瓜的植株茎部及根际土壤样本，对黄皮西瓜和绿皮西瓜茎部内生细菌及根际土壤细菌群落的结构特征进行了比较研究。首先，黄皮西瓜和绿皮西瓜之间可检测到一些优势细菌的比例和丰度存在显著差异。同时，虽然可以发现内生细菌的丰度不同，但黄皮西瓜和绿皮西瓜之间未观察到显著差异。此外，绿皮西瓜根际土壤优势细菌属为芽单胞菌门、粘球菌门、WPS-2、芽单胞菌科未定属和慢生根瘤菌属。以上所有结果表明，根际和内生细菌的差异确实被不同的西瓜表型（与瓜皮颜色形成有关）招募为“工作者”。
