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Polysaccharide composition during cotton seed fibre development:temporal differences between species and in different seasons
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作者 PETTOLINO Filomena A. YULIA Dina +1 位作者 BACIC Antony LLEWELLYN Danny J. 《Journal of Cotton Research》 CAS 2022年第4期12-24,共13页
Background:Cotton seed fibres are long single-celled epidermal trichomes that first appear on the surface of the ovule at anthesis and then elongate rapidly over a period of 15-25 days until a secondary cell wall(SCW)... Background:Cotton seed fibres are long single-celled epidermal trichomes that first appear on the surface of the ovule at anthesis and then elongate rapidly over a period of 15-25 days until a secondary cell wall(SCW)begins to develop through a rapid increase in the deposition of microfibrillar cellulose between the plasma membrane and the primary cell wall that eventually terminates elongation.Quantitative measurements of the different polysaccharide components in both wall types over time and how they influence fibre quality can direct studies involved in enhanc-ing fibre properties for yarn quality through cell wall manipulation or molecular breeding.Results:A detailed chemical analysis of cell wall composition by differential solvent fractionation was used to identify the range of polysaccharides present in mature cotton fibres and used to validate a simpler total cell wall monosaccharide linkage analysis protocol for wall compositional analysis.Analysis of fibres from 5 days post-anthesis through maturity for three cultivated species,Gossypium hirsutum,G.barbadense,and G.arboreum,showed the dynamic nature of cell wall polysaccharide composition through fibre development and that it progressed differently for each species.Plants grown in the glasshouse during either autumn to winter or spring to summer and within each species had fibre qualities and temporal aspects of cell wall development that were different for each season.Notably,the timing of the deposition of the SCW was delayed in winter grown plants and appeared to influence key fibre qual-ity properties.Conclusions:These results suggest that the temporal aspects of cell wall polysaccharide biogenesis during fibre development influence final fibre quality,and this timing is determined by both genetic and environmental factors.The onset of SCW synthesis appears to be a critical factor coinciding with termination of fibre elongation and specify-ing the duration of wall thickening that then affects fibre length and other wall-associated quality parameters that ultimately determine yarn quality. 展开更多
关键词 Fibre development Gossypium hirsutum Gossypium barbadense Gossypium arboreum
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环境和生态意识催生的社会许可问题:缘起与应对 被引量:7
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作者 张爱荣 陈俊芳 +5 位作者 匡仪 王晓明 吴小菊 杨舒雯 郑蕊 李纾 《心理科学进展》 CSSCI CSCD 北大核心 2018年第10期1711-1723,共13页
在经济迅猛发展的今天,民众的环境和生态意识不断提高,参与保护环境行为的积极性也不断增强。因此,项目开发方要想在某地能够顺利地实行一些可能会引发环境问题的项目,除了必要的法律许可外,还应获得并维持当地居民的同意与支持,即社会... 在经济迅猛发展的今天,民众的环境和生态意识不断提高,参与保护环境行为的积极性也不断增强。因此,项目开发方要想在某地能够顺利地实行一些可能会引发环境问题的项目,除了必要的法律许可外,还应获得并维持当地居民的同意与支持,即社会许可。没有获得社会许可的项目开发面临着多种风险并往往为此付出很大的经济代价。虽然,社会许可在矿业、化学工业等相关领域已经得到了广泛关注,但是近年来这一概念才逐渐受到了心理学家的重视。本文回顾了社会许可的概念起源、测量范式,以及获得和维持社会许可的途径,并在此基础上总结了社会许可的影响因素和相关政策建议。最后,针对社会许可测量和获得中存在的问题,本文从心理学的视角出发,为未来社会许可的研究方向提出建议和展望。 展开更多
关键词 社会许可 社区 利益相关者 心理台风眼效应 环境影响 社区环境
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印尼海龙目海峡上层环流季节变化及影响机制 被引量:1
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作者 寇睿之 徐振华 +2 位作者 尹宝树 冯明 李群 《海洋与湖沼》 CAS CSCD 北大核心 2020年第4期829-838,共10页
本文基于2002-2016年OFAM(Ocean Forecast Australian Model)模式数据,通过谱分析与相关分析等方法,研究了龙目海域上层环流结构的季节变化特征及主要的影响因素。分析结果表明,龙目海峡(Lombok Strait)平均流量占印尼贯穿流(Indonesian... 本文基于2002-2016年OFAM(Ocean Forecast Australian Model)模式数据,通过谱分析与相关分析等方法,研究了龙目海域上层环流结构的季节变化特征及主要的影响因素。分析结果表明,龙目海峡(Lombok Strait)平均流量占印尼贯穿流(Indonesian throughflow, ITF)总出口流量的15%,呈现出南半球冬强夏弱的特点,具有半年和一年的周期特征;龙目海域上层环流结构具有明显的季节特征,受到卡里马塔海峡贯穿流(Karimatastraitthroughflow,KSTF)和望加锡海峡贯穿流(Makassarstrait throughflow,MSTF)的周期性影响,一年可以分为四个阶段,存在结构性差异。KSTF(MSTF)为上层龙目海峡带来高温低盐(低温高盐)水团。进一步分析发现局地风场、大气季节内振荡(Madden-Julian Oscillation, MJO)以及海底地形是龙目海域上层环流结构季节变化的主要影响因素。 展开更多
关键词 龙目海峡 印尼贯穿流 OFAM(Ocean Forecast Australian Model) 上层环流
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