The evolution and diurnal expression patterns of photosynthetic pathway genes of the invasive alien weed,Mikania micrantha  

作　　者：Kangkang Wang Mengjiao Jin Jingjing Li Yesong Ren Zaiyuan Li Xinghai Ren Cong Huang Fanghao Wan Wanqiang Qian Bo Liu 

机构地区：[1]Shenzhen Branch,Guangdong Laboratory of Lingnan Modern Agriculture/Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs,Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,Shenzhen 518120,China [2]State Key Laboratory of Crop Stress Adaptation and Improvement,School of Life Sciences,Henan University,Kaifeng 475004,China [3]Shenzhen Research Institute of Henan University,Shenzhen 518000,China

出　　处：《Journal of Integrative Agriculture》2024年第2期590-604,共15页农业科学学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(32072490);the National Key R&D Program of China(2021YFC2600100 and2021YFC2600101);the Agricultural Science and Technology Innovation Program,China。

摘　　要：Mikania micrantha is a fast-growing global invasive weed species that causes severe damage to natural ecosystems and very large economic losses of forest and crop production.It has advantages in photosynthesis,including a similar net photosynthetic rate as C4 plants and a higher carbon fixation capacity.We used a combination of genomics and transcriptomics approaches to study the evolutionary mechanisms and circadian expression patterns of M.micrantha.In M.micrantha,16 positive selection genes focused on photoreaction and utilization of photoassimilates.In different tissues,98.1%of the genes associated with photoresponse had high expression in stems,and more than half of the genes of the C4 cycle had higher expression in stems than in leaves.In stomatal opening and closing,2 genes of carbonic anhydrase(CAs)had higher expression at 18:00 than at 8:00,and the slow anion channel 1(SLAC1)and high-leaf-temperature 1 kinase(HT1)genes were expressed at low levels at 18:00.In addition,genes associated with photosynthesis had higher expression levels at 7:00 and 17:00.We hypothesized that M.micrantha may undergo photosynthesis in the stem and flower organs and that some stomata of the leaves were opening at night by CO_(2)signals.In addition,its evolution may attenuate photoinhibition at high light intensities,and enhance more efficient of photosynthesis during low light intensity.And the tissue-specific photosynthetic types and different diurnal pattern of photosynthetic-related genes may contribute to its rapid colonization of new habitats of M.micrantha.

关 键 词：invasion plant Mikania micrantha photosynthesis STOMATA stem 

分 类 号：S451[农业科学—植物保护]