| 1 | 克隆植物空间拓展及在退化生境修复中的应用显示文摘克隆植物空间拓展特性可使其高效利用斑块化资源,对其生长具有重要意义,同时对斑块化退化生境也具有潜在修复价值。本文首先对克隆植物适应异质环境的生存策略进行归纳,指出克隆植物多基于克隆整合,通过调控表型塑性、觅食行为及权衡生物量分配,强化克隆内分工,使不同生境分株表现出'趋富特化'特性,以提高斑块化资源利用效率和适应能力。同时基于'竞争–胁迫–干扰competition–stress–ruderal(C–S–R)'生活史对策理论,介绍了干扰、胁迫、竞争等环境因素对克隆植物拓展的影响及驱动机制,认为适度干扰(放牧、刈割等)可促进克隆植物拓展。本文对利用克隆植物拓展修复退化生境的应用进行了总结与展望。克隆植物通过拓展产生发达的网状结构,有利于防风固沙、改良土壤环境,且繁殖体的拓展起到先锋物种作用,对退化生境物种更新、群落重建以及生态系统生产力具有重要影响,这均利于退化生境的恢复演替。指出今后应注重克隆植物生物学和恢复生态学交叉领域的研究,为退化草地的修复和治理开辟新的研究思路。 | 祝婉月 王建永 许彤彤 潘晓斌 IRAM Abdullah 王岭 | 2020 | 草业科学2020，37，11： | 5 |
| 2 | Correlations among oligonucleotide repeats, nucleotide substitutions, and insertion-deletion mutations in chloroplast genomes of plant family Malvaceae显示文摘The co-occurrence of mutational events including substitutions and insertions—deletions(InDels)with oligonucleotide repeats has previously been reported for a limited number of prokaryotic,eukaryotic,and organelle genomes.In this study,the correlations among these mutational events in chloroplast genomes of species in the eudicot family Malvaceae were investigated.This study also reported chloroplast genome sequences of Hibiscus mutabilis,Malva parvifJora,and Malvastrum coromandelianum.These three genomes and 16 other publicly available chloroplast genomes from 12 genera of Malvaceae were used to calculate the correlation coefficients among the mutational events at干amily,subfamily,and genus levels.In these comparisons,chloroplast genomes were pairwise aligned to record the substitutions and the InDels in mutually exclusive,250 nucleotide long bins.Taking one among the two genomes as a reference,the coordinate positions of oligonucleotide repeats in the reference genome were recorded.The extent of correlations among repeats,substitutions,and InDels was calculated and categorized as follows:very weak(0.1-0.19),weak(0.20-0.29),moderate(0.30-0.39),and strong(0.4-0.69).The extent of correlations ranged 0.201-0.6 between^InDels and single-nucleotide polymorphism(SNP),'0.182-0.513 between“InDels and repeat,”and 0.055-0.403 between“SNPs and repeats.”At family-and subfamily-level comparisons,88%-96%of the repeats showed co-occurrence with SNPs,whereas at the genus level,23%-86%of the repeats co-occurred with SNPs in same bins.Our findings support the previous hypothesis suggesting the use of oligonucleotide repeats as a proxy for finding the mutational hotspots. | Abdullah Furrukh Mehmood Iram Shahzadi Zain Ali Madiha Islam Muhammad Naeem Bushra Mirza Peter JLockhart Ibrar Ahmed Mohammad Tahir Waheed | 2021 | Journal of Systematics and Evolution2021，59，2： | 1 |
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