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1蔬菜种业的现状及展望显示文摘蔬菜对世界人口健康、农业农村经济和国际贸易都起到了重要作用,更是我国农业农村发展的重要产业。我国蔬菜常年种植面积达0.2亿hm2,总产量7亿t以上,总产值超过2万亿元,以约10%的种植面积创造了整个种植业39.46%的产值。全国农村有近1亿农民直接从事蔬菜生产,蔬菜生产对全国农民人均年收入贡献近2 000元。蔬菜产业在我国服务三农、国家脱贫攻坚和乡村振兴战略中发挥着至关重要的作用。王立浩 2022蔬菜2022,,4:4
2辣椒分子育种研究进展显示文摘辣椒是一种十分重要的蔬菜作物,其栽培面积在我国蔬菜作物中位居第一.辣椒常规育种近年来取得了很大的成就,随着资源的不断利用,新品种选育越来越需要借助分子育种手段来提高育种效率,创造常规方法难以获得的新种质.辣椒分子育种已经取得了重要进展.本文主要对辣椒分子标记、辣椒素类物质和红色素生物合成、雄性不育、抗病、抗逆等分子机理、生物技术改良等取得的进展作一综述,并指出存在的问题和作出展望.雷建军 朱张生 陈长明 曹必好 陈国菊 郑婕 吴昊 肖艳辉 蒋园园 原远 廖毅 宋佳丽 2023西南大学学报(自然科学版)2023,45,7:2
3Single-cell transcriptome atlas reveals spatiotemporal developmental trajectories in the basal roots of moso bamboo (Phyllostachys edulis)显示文摘Roots are essential for plant growth and development.Bamboo is a large Poaceae perennial with 1642 species worldwide.However,little is known about the transcriptional atlas that underpins root cell-type differentiation.Here,we set up a modified protocol for protoplast preparation and report single-cell transcriptomes of 14279 filtered single cells derived from the basal root tips of moso bamboo.We identified four cell types and defined new cell-type-specific marker genes for the basal root.We reconstructed the developmental trajectories of the root cap,epidermis,and ground tissues and elucidated critical factors regulating cell fate determination.According to in situ hybridization and pseudotime trajectory analysis,the root cap and epidermis originated from a common initial cell lineage,revealing the particularity of bamboo basal root development.We further identified key regulatory factors for the differentiation of these cells and indicated divergent root developmental pathways between moso bamboo and rice.Additionally,PheWOX13a and PheWOX13b ectopically expressed in Arabidopsis inhibited primary root and lateral root growth and regulated the growth and development of the root cap,which was different from WOX13 orthologs in Arabidopsis.Taken together,our results offer an important resource for investigating the mechanism of root cell differentiation and root system architecture in perennial woody species of Bambusoideae.Zhanchao Cheng Changhong Mu Xiangyu Li Wenlong Cheng Miaomiao Cai Chongyang Wu Jutang Jiang Hui Fang Yucong Bai Huifang Zheng Ruiman Geng Junlei Xu Yali Xie Yuping Dou Juan Li Shaohua Mu Jian Gao 2023Horticulture Research2023,10,8:0
4CmMYB3-like negatively regulates anthocyanin biosynthesis and flower color formation during the post-flowering stage in Chrysanthemum morifolium显示文摘Color fading caused by a decrease in anthocyanin accumulation during the post-flowering stage significantly affects postharvest quality of chrysanthemum.However,the underlying mechanism by which anthocyanin accumulation decreases during the post-flowering stage still unclear,which greatly restricts design of molecular breeding in chrysanthemum.Here,a chrysanthemum SG7 R2R3 MYB transcription factor(TF),CmMYB3-like,was identified to have a function in regulating anthocyanin biosynthesis during the post-flowering stage.Quantitative real time PCR(qRT-PCR)assays showed that the expression of CmMYB3-like was gradually downregulated when anthocyanin content increased during the flowering stage and was significantly upregulated during the post-flowering stage.Genetic transformation of chrysanthemum and dual-luciferase assays in N.benthamiana leaves showed that CmMYB3-like suppressed anthocyanin accumulation by inhibiting the transcription of CmCHS and CmANS directly and that of CmF3H indirectly.However,overexpression or suppression of CmMYB3-like did not affect the biosynthesis of flavones or flavonols.Genetic transformation of chrysanthemum revealed that the overexpression of CmMYB3-like inhibited anthocyanin accumulation,but its suppression prevented the decrease in anthocyanin accumulation during the post-flowering stage.Our results revealed a crucial role of CmMYB3-like in regulating the color of petals during the post-flowering stage and provided a target gene for molecular design breeding to improve the postharvest quality of chrysanthemum.Lijie Zhou Shenhui Liu Yiguang Wang Yuxi Wang Aiping Song Jiafu Jiang Sumei Chen Zhiyong Guan Fadi Chen 2024Horticultural Plant Journal2024,10,1:0
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