首页|Telomere-to-telomere genome of the allotetraploid legume Sesbania cannabina reveals transposon-driven subgenome divergence and mechanisms of alkaline stress tolerance

Telomere-to-telomere genome of the allotetraploid legume Sesbania cannabina reveals transposon-driven subgenome divergence and mechanisms of alkaline stress tolerance

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Alkaline soils pose an increasing problem for agriculture worldwide,but using stress-tolerant plants as green manure can improve marginal land.Here,we show that the legume Sesbania cannabina is very tolerant to alkaline conditions and,when used as a green manure,substantially improves alkaline soil.To understand genome evolution and the mechanisms of stress tolerance in this allotetraploid legume,we generated the first telomere-to-telomere genome assembly of S.cannabina spanning～2,087 Mb.The assembly included all centromeric regions,which contain centromeric satellite repeats,and complete chromosome ends with telomeric characteristics,Further genome analysis distinguished A and B subgenomes,which diverged approximately 7.9 million years ago.Comparative genomic analysis revealed that the chromosome homoeologs underwent large-scale inversion events(＞10 Mb)and a significant,transposon-driven size expansion of the chromosome 5A homoeolog.We further identified four specific alkali-induced phosphate transporter genes in S.cannabina;these may function in alkali tolerance by relieving the deficiency in available phosphorus in alkaline soil.Our work highlights the significance of S.cannabina as a green tool to improve marginal lands and sheds light on subgenome evolution and adaptation to alkaline soils.

Sesbania cannabinaalkaline stresstelomere-to-telomere genomelegumegreen manurephosphate transporterallotetraploid

Haofei Luo、Xiaofei Wang、Changqing You、Xuedan Wu、Duofeng Pan、Zhiyao Lv、Tong Li、Dongmei Zhang、Zhongbao Shen、Xiaodong Zhang、Guodao Liu、Kaixuan He、Qingtong Ye、Yajun Jia、Qinghua Zhao、Xian Deng、Xiaofeng Cao、Xianwei Song、Gai Huang

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State Key Laboratory of Plant Genomics and National Center for Plant Gene Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China

Hainan Yazhou Bay Seed Lab,Sanya 572025,China

University of Chinese Academy of Sciences,Beijing 100049,China

Institute of Forage and Grassland Sciences,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China

Shandong Academy of Agricultural Sciences,Jinan 250100,China

National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land,Dongying 257345,China

Shandong Green Manure Ecological Technology Co.,Ltd,Dongying 257345,China

State Key Laboratory of Tropical Crop Breeding,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China

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Strategic Priority Research Program of the Chinese Academy of SciencesNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaScience & Technology Specific Projects in Agricultural Hightech Industrial Demonstration Area of the Yellow River Deltaearmarked fund for CARS-Green ManureYouth Innovation Promotion Association of CAS

XDA280300002022YFD15005032022YFF10034012022SZX14CARS-22Y2022039

2024

10.1007/s11427-023-2463-y

中国科学:生命科学(英文版)
中国科学院

中国科学:生命科学(英文版)

CSTPCD
影响因子：0.806
ISSN：1674-7305
年,卷(期)：2024.67(1)
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