首页|The Cissus quadrangularis genome reveals its adaptive features in an arid habitat

The Cissus quadrangularis genome reveals its adaptive features in an arid habitat

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Cissus quadrangularis is a tetraploid species belonging to the Vitaceae family and is known for the Crassulacean acid metabolism(CAM)pathway in the succulent stem,while the leaves perform C3 photosynthesis.Here,we report a high-quality genome of C.quadrangularis comprising a total size of 679.2 Mb which was phased into two subgenomes.Genome annotation identified 51857 protein-coding genes,while approximately 47.75％of the genome was composed of repetitive sequences.Gene expression ratios of two subgenomes demonstrated that the sub-A genome as the dominant subgenome played a vital role during the drought tolerance.Genome divergence analysis suggests that the tetraploidization event occurred around 8.9 million years ago.Transcriptome data revealed that pathways related to cutin,suberine,and wax metabolism were enriched in the stem during drought treatment,suggesting that these genes contributed to the drought adaption.Additionally,a subset of CAM-related genes displayed diurnal expression patterns in the succulent stems but not in leaves,indicating that stem-biased expression of existing genes contributed to the CAM evolution.Our findings provide insights into the mechanisms of drought adaptation and photosynthesis transition in plants.

Qingyun Li、Yi Wang、Huimin Zhou、Yuanshuang Liu、Duncan Kiragu Gichuki、Yujun Hou、Jisen Zhang、Rishi Aryal、Guangwan Hu、Tao Wan、Sara Getachew Amenu、Robert Wahiti Gituru、Haiping Xin、Qingfeng Wang

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CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture,Core Botanical Gardens/Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,China

Sino-Africa Joint Research Center,Chinese Academy of Sciences,Wuhan 430074,China

University of Chinese Academy of Sciences,Beijing 100049,China

CAS Key Laboratory of Plant Resources,Institute of Botany,Chinese Academy of Science,Beijing 100093,China

Key Lab for Conservation and Utilization of Subtropical AgroBiological Resources and Guangxi Key Lab for Sugarcane Biology,Guangxi University,Nanning 530004,China

Department of Horticultural Science,North Carolina State University,Raleigh,NC 27695,USA

Department of Botany,Jomo Kenyatta University of Agriculture and Technology,62000-00200,Nairobi,Kenya

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国家自然科学基金Scientific Research Program of Sino-Africa Joint Research CenterScientific Research Program of Sino-Africa Joint Research CenterScientific Research Program of Sino-Africa Joint Research Center

31961143026SAJC201614SAJL201607SAJC202101

2024

10.1093/hr/uhae038

园艺研究(英文)

园艺研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.11(4)
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