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Case study of a rhizosphere microbiome assay on a bamboo rhizome with excessive shoots

By Fuqiang Cui, Yifang Yang, Mengyuan Ye, Wei Wei, Wenqian Huang, Ying Wu, Jiao Xi, Xiaoxue Ye, Shutong Zhou, Zhubing Hu, Renyi Gui, Wenwu Wu, Kim Yrjala, Kirk Overmyer, Shenkui Liu

Posted 17 Mar 2021
bioRxiv DOI: 10.1101/2021.03.16.435735

Young Moso bamboo shoots are a very popular seasonal food. Bamboo is an important source of income for farmers and the value for cultivation has recently been estimated to $30,000 per hectare. A rare and valuable phenomenon has recently appeared where dozens of adjacent buds within a single Moso bamboo rhizome have grown into shoots. Due to its rarity, this phenomenon, which is of practical importance for the production of edible shoots, has not been scientifically studied. We report the occurrence of a rhizome with 18 shoots, of which the microbiome were analyzed, using rhizomes having one or no shoots as controls. The community of prokaryotes, but not fungi, correlated with the shoot numbers. Burkholderia was the most abundant genus, which negatively correlated with rhizome shoot number, while Clostridia and Ktedonobacteria positively correlated with many shoots. Two Burkholderia strains were isolated and their plant-growth promoting activity was tested. The isolated Burkholderia strains attenuated the growth of bamboo seedlings. Analysis of collected events of enhanced shoot production in China showed no evidence that enhanced shoot development was heritable. Overall, our data provides a firsthand study on excessive shoot development of bamboo.

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