Genomes of leafy and leafless Platanthera orchids illuminate the evolution of mycoheterotrophy.
Genomes of leafy and leafless Platanthera orchids illuminate the evolution of mycoheterotrophy.
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有叶和无叶 Platanthera 兰花的基因组阐明了真菌异养的进化
DOI：
10.1038/s41477-022-01127-9
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发表时间：
2022-04
期刊：
影响因子：
18
通讯作者：
Liu, Zhong-Jian
中科院分区：
文献类型：
--
作者：
Li, Ming-He;Liu, Ke-Wei;Li, Zhen;Lu, Hsiang-Chia;Ye, Qin-Liang;Zhang, Diyang;Wang, Jie-Yu;Li, Yu-Feng;Zhong, Zhi-Ming;Liu, Xuedie;Yu, Xia;Liu, Ding-Kun;Tu, Xiong-De;Liu, Bin;Hao, Yang;Liao, Xing-Yu;Jiang, Yu-Ting;Sun, Wei-Hong;Chen, Jinliao;Chen, Yan-Qiong;Ai, Ye;Zhai, Jun-Wen;Wu, Sha-Sha;Zhou, Zhuang;Hsiao, Yu-Yun;Wu, Wan-Lin;Chen, You-Yi;Lin, Yu-Fu;Hsu, Jui-Ling;Li, Chia-Ying;Wang, Zhi-Wen;Zhao, Xiang;Zhong, Wen-Ying;Ma, Xiao-Kai;Ma, Liang;Huang, Jie;Chen, Gui-Zhen;Huang, Ming-Zhong;Huang, Laiqiang;Peng, Dong-Hui;Luo, Yi-Bo;Zou, Shuang-Quan;Chen, Shi-Pin;Lan, Siren;Tsai, Wen-Chieh;van de Peer, Yves;Liu, Zhong-Jian
为了加深对真菌异养植物起源和进化的认识，本文对两种兰科植物--部分真菌异养的紫金舌唇兰和全真菌异养的广东舌唇兰进行了染色体水平的基因组组装。比较分析表明，真菌异养与增加的替代率和基因丢失，和大多数感光基因和生长素转运蛋白基因的缺失可能与完全真菌异养兰花的独特表型。相反，催化海藻糖转化为葡萄糖的海藻糖酶基因在大多数测序的兰花中扩展，这与兰花非胚乳种子的萌发在原球茎阶段需要来自真菌的碳水化合物的事实一致。结果表明，广东假单胞菌的成熟植株与光合兰花不同，它持续表达海藻糖酶基因，从真菌那里劫持海藻糖。因此，我们提出，真菌异养在成熟的兰花是一个延续的原球茎阶段，通过维持海藻糖酶基因的表达。我们的研究结果揭示了初始的，部分的和完全的真菌异养的分子机制。
To improve our understanding of the origin and evolution of mycoheterotrophic plants, we here present the chromosome-scale genome assemblies of two sibling orchid species: partially mycoheterotrophic Platanthera zijinensis and holomycoheterotrophic Platanthera guangdongensis. Comparative analysis shows that mycoheterotrophy is associated with increased substitution rates and gene loss, and the deletion of most photoreceptor genes and auxin transporter genes might be linked to the unique phenotypes of fully mycoheterotrophic orchids. Conversely, trehalase genes that catalyse the conversion of trehalose into glucose have expanded in most sequenced orchids, in line with the fact that the germination of orchid non-endosperm seeds needs carbohydrates from fungi during the protocorm stage. We further show that the mature plant of P. guangdongensis, different from photosynthetic orchids, keeps expressing trehalase genes to hijack trehalose from fungi. Therefore, we propose that mycoheterotrophy in mature orchids is a continuation of the protocorm stage by sustaining the expression of trehalase genes. Our results shed light on the molecular mechanism underlying initial, partial and full mycoheterotrophy.
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DOI：
10.1098/rspb.2004.2807
发表时间：
2004-09-07
影响因子：
4.7
作者：
Bidartondo, MI;Burghardt, B;Read, DJ
通讯作者：
Read, DJ
影响因子：
5.6
作者：
Chen M;Arato M;Borghi L;Nouri E;Reinhardt D
通讯作者：
Reinhardt D
影响因子：
3
作者：
Barrett, Craig F.;Davis, Jerrold I.
通讯作者：
Davis, Jerrold I.
影响因子：
16.6
作者：
Chen, Yi-Cun;Li, Zhen;Wang, Yang-Dong
通讯作者：
Wang, Yang-Dong
影响因子：
64.8
作者：
D'Hont, Angelique;Denoeud, France;Wincker, Patrick
通讯作者：
Wincker, Patrick