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基于代谢组学分析雪茄烟叶晾制时“青斑”组织的代谢差异及形成原因 被引量:5
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作者 于连营 杨锦鹏 +6 位作者 余君 李楠芬 杨荣洲 汪社亮 丁广大 杨春雷 徐芳森 《华中农业大学学报》 CAS CSCD 北大核心 2022年第1期152-159,共8页
为探究雪茄烟叶自然晾制过程中青色斑点(简称“青斑”)形成的生理机制及代谢差异,提高茄衣烟叶外观品质,改进晾制技术,以雪茄烟‘楚雪10号’品种为试验材料,利用高压液相色谱串联质谱(HPLC-MS/MS)非靶向代谢组学技术,分析烟叶“青斑”... 为探究雪茄烟叶自然晾制过程中青色斑点(简称“青斑”)形成的生理机制及代谢差异,提高茄衣烟叶外观品质,改进晾制技术,以雪茄烟‘楚雪10号’品种为试验材料,利用高压液相色谱串联质谱(HPLC-MS/MS)非靶向代谢组学技术,分析烟叶“青斑”和正常两组织部位的代谢差异。研究结果表明:“青斑”部位叶绿素和绿原酸含量显著高于正常部位,大量未分解的叶绿素和绿原酸在晾制末期沉积是“青斑”形成的生理基础;“青斑”和正常两组织部位间,酪氨酸代谢、苯丙氨酸代谢和类黄酮生物合成途径具有显著差异;绿原酸和二氢玉米素可作为“青斑”形成过程的化学标记物,晾制过程中可检测其含量高低来监测是否会出现“青斑”;烟叶变黄期晾房湿度骤降且波动过大,可能是形成“青斑”的外部环境因素,建议采用湿度可控晾房晾制并适当提高变黄期湿度。 展开更多
关键词 雪茄烟 茄衣 “青斑” 叶绿素 非靶向代谢组学 烟叶
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三种石斑鱼的中文定名问题 被引量:1
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作者 方琼珊 郑乐云 +1 位作者 林琪 王涵生 《福建水产》 2009年第3期17-21,共5页
有三种石斑鱼俗名都叫"青斑"。即:"红点青斑"Epinephelus.coioides(另一学名为E.suillus)、"黑点青斑"E.malabaricus(另一学名为E.salmonoides)及E.tauvina,即巨石斑鱼。其中最容易混淆的是"红点青... 有三种石斑鱼俗名都叫"青斑"。即:"红点青斑"Epinephelus.coioides(另一学名为E.suillus)、"黑点青斑"E.malabaricus(另一学名为E.salmonoides)及E.tauvina,即巨石斑鱼。其中最容易混淆的是"红点青斑"E.coioides和"黑点青斑"E.malabaricus。两者共同点是身上都布满斑点;都有5条深褐色的斜纹;繁殖季节、产卵习性、生长速度等大致相同。但E.malabaricus的斑点小呈黑褐色,并分布到下颌腹面,身上有白点及白斑。E.coioides的斑点大呈红褐色的,前颌腹面没有斑点,身上无白点及白斑。以往一些文献的学名及其对应的中文名称存在不少错误和混乱。本文建议:中文名称"点带石斑鱼","斜带石斑鱼"应该合并作为E.coioides的同种异名使用。E.malabaricus的中文名称应为"马拉巴石斑鱼"比较合适。 展开更多
关键词 俗名“青斑” 石斑鱼 中文定名
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Small-scale switch in cover-perimeter relationships of patches indicates shift of dominant species during grassland degradation 被引量:3
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作者 Ming-Hua Song Johannes HCCornelissen +6 位作者 Yi-Kang Li Xing-Liang Xu Hua-Kun Zhou Xiao-Yong Cui Yan-Fen Wang Rong-Yan Xu Qi Feng 《Journal of Plant Ecology》 SCIE CSCD 2020年第6期704-712,共9页
Aims Grasslands are globally threatened by climate changes and unsustainable land-use,which often cause transitions among alternative stable states,and even catastrophic transition to desertification.Spatial vegetatio... Aims Grasslands are globally threatened by climate changes and unsustainable land-use,which often cause transitions among alternative stable states,and even catastrophic transition to desertification.Spatial vegetation patch configurations have been shown to signify such transitions at large spatial scale.Here,we demonstrate how small-scale patch configurations can also indicate state transitions.Methods The whole spatial series of degradation successions were chosen in alpine grasslands characterized as seven typical communities.Patch numbers,and perimeter and cover of each patch were recorded using adjacent quadrats along transects in each type of the communities.Species abundance within each patch was measured.Important Findings Across seven grazing-induced degradation stages in the world’s largest expanse of grassland,from dense ungrazed turf to bare black-soil crust,patch numbers and perimeters first increased as patch cover decreased.Numbers and perimeters then decreased rapidly beyond an intersection point at 68%of initial continuous vegetation cover.Around this point,the vegetation fluctuated back and forth between the sedge-dominated grassland breaking-up phase and the forb-dominated phase,suggesting impending shift of grassland state.This study thus demonstrates how ground-based small-scale vegetation surveys can provide a quantitative,easy-to-use signals for vegetation degradation,with promise for detecting the catastrophic transition to desertification. 展开更多
关键词 grassland degradation state transition Tibetan Plateau trade-off vegetation patchiness
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