本文主要研究内容
作者张晗（2019）在《不同水分梯度下甘草叶片结构发育及糖代谢特征研究》一文中研究指出：本文以甘草幼苗为材料,在盆栽条件下,以人工控水模拟土壤干旱生境,观测了不同水分胁迫程度下甘草幼苗植株形态特征以及叶片超微结构;同时测定了叶片光合性能及其碳水化合物代谢特征,主要结果为:(1)水分供应正常情况下(75%),植株叶片鲜绿,叶片繁茂,枝条舒展,生长健壮;在轻度干旱胁迫时(60%),植株叶片仍保持鲜绿,生长旺盛;在中度干旱胁迫时(45%),植株叶片出现发黄和萎蔫,枝条下垂;在重度干旱胁迫时(30%),植株呈现干枯状,叶片发黄边缘卷曲,枝条干枯坏死并严重下垂。随着干旱程度的增加甘草根部粗壮,根毛增多,茎叶萎缩枯黄,地上部/地下部比值减小。干旱程度的增加使甘草植株逐渐失水萎蔫,甘草的生物量也会由地上部转到地下部,根部为适应干旱环境而逐渐增长粗壮。(2)随着干旱胁迫的加重,甘草叶片电解质渗透率、MDA含量呈现逐渐升高的趋势。干旱胁迫导致细胞质膜正常的生理功能发生紊乱。(3)甘草叶片下表皮气孔密度、腺体个数高于上表皮;上表皮气孔开张比、气孔开张宽度高于下表皮。随着干旱胁迫程度的增加,气孔密度、气孔开张比、气孔开张宽度逐渐减少,而腺体个数随干旱胁迫加重呈现递增趋势。甘草受干旱胁迫程度的增加,叶片通过调节气孔的开闭来减少水分损失,在中度干旱胁迫时,甘草的气孔呈现少量气孔关闭的状态,在重度干旱胁迫时,甘草的气孔逐渐倾向于关闭。由此可知,随着生境的变化甘草叶片形态结构会随之改变,这是植物主动适应环境的方式,而且对干旱胁迫生境的这种主动适应,既能提高植株的抗旱能力,又能降低其在干旱环境下所受到的伤害。(4)随着干旱胁迫程度的增加,甘草幼苗叶片的Pn、Tr、和Gs都呈现先升高后降低的趋势,在轻度干旱胁迫时达到最高;而Ci是逐渐上升,在重度干旱胁迫时达到最大。甘草幼苗叶片的叶绿素含量降低,这是甘草通过降低叶片中叶绿素含量和改变光合特性使其避免干旱胁迫带来的伤害做出的一系列生理反应。说明甘草有一定的抗旱性,重度干旱条件下甘草光合作用能力降低,并且限制甘草幼苗光合作用的因素是由非气孔因素导致的。(5)随着干旱胁迫程度的增加,甘草幼苗叶片的可溶性糖、可溶性蛋白、游离脯氨酸均呈现逐渐升高的趋势,说明甘草在干旱胁迫下具有一定的渗透调节能力。通过积累渗透调节物质提高细胞的吸水力和保水力。(6)甘草叶片蔗糖、葡萄糖、果糖含量在轻度干旱胁迫时积累的糖最多;而三种糖中蔗糖含量最高,说明甘草叶片是以积累蔗糖为主。SPS有较高的活性,促进了叶片蔗糖的合成。SS-活性在各个水分条件下远大于SS+活性,说明甘草叶片SS分解方向占主要作用。甘草叶片糖的积累与叶中NI、AI活性呈显著负相关。NI活性在各个水分条件下远大于AI活性。甘草叶片淀粉磷酸化酶活性的变化呈现逐渐递减的趋势,与淀粉含量呈负相关。(7)在水分正常对照下,蔗糖与淀粉磷酸化酶呈正相关性,淀粉与NI呈极负相关性。在轻度干旱胁迫时,葡萄糖与SPS呈极负相关性,与淀粉磷酸化酶呈正相关性;果糖与SPS呈极负相关性,与淀粉磷酸化酶呈极负相关性,相关系数为-1.000;淀粉与SS-呈负相关性,与AI,NI呈极正相关性。在中度干旱胁迫时,蔗糖与AI呈极正相关性;果糖与SPS呈正相关性;淀粉与SS-呈正相关性,与淀粉磷酸化酶呈负相关性。在重度干旱胁迫时,葡萄糖与SS-呈极正相关性;果糖与淀粉磷酸化酶呈负相关性;淀粉与SS+呈极正相关性,与NI呈极正相关性,相关系数为1.000。
Abstract
ben wen yi gan cao you miao wei cai liao ,zai pen zai tiao jian xia ,yi ren gong kong shui mo ni tu rang gan han sheng jing ,guan ce le bu tong shui fen xie pai cheng du xia gan cao you miao zhi zhu xing tai te zheng yi ji xie pian chao wei jie gou ;tong shi ce ding le xie pian guang ge xing neng ji ji tan shui hua ge wu dai xie te zheng ,zhu yao jie guo wei :(1)shui fen gong ying zheng chang qing kuang xia (75%),zhi zhu xie pian xian lu ,xie pian fan mao ,zhi tiao shu zhan ,sheng chang jian zhuang ;zai qing du gan han xie pai shi (60%),zhi zhu xie pian reng bao chi xian lu ,sheng chang wang cheng ;zai zhong du gan han xie pai shi (45%),zhi zhu xie pian chu xian fa huang he wei nian ,zhi tiao xia chui ;zai chong du gan han xie pai shi (30%),zhi zhu cheng xian gan ku zhuang ,xie pian fa huang bian yuan juan qu ,zhi tiao gan ku huai si bing yan chong xia chui 。sui zhao gan han cheng du de zeng jia gan cao gen bu cu zhuang ,gen mao zeng duo ,jing xie wei su ku huang ,de shang bu /de xia bu bi zhi jian xiao 。gan han cheng du de zeng jia shi gan cao zhi zhu zhu jian shi shui wei nian ,gan cao de sheng wu liang ye hui you de shang bu zhuai dao de xia bu ,gen bu wei kuo ying gan han huan jing er zhu jian zeng chang cu zhuang 。(2)sui zhao gan han xie pai de jia chong ,gan cao xie pian dian jie zhi shen tou lv 、MDAhan liang cheng xian zhu jian sheng gao de qu shi 。gan han xie pai dao zhi xi bao zhi mo zheng chang de sheng li gong neng fa sheng wen luan 。(3)gan cao xie pian xia biao pi qi kong mi du 、xian ti ge shu gao yu shang biao pi ;shang biao pi qi kong kai zhang bi 、qi kong kai zhang kuan du gao yu xia biao pi 。sui zhao gan han xie pai cheng du de zeng jia ,qi kong mi du 、qi kong kai zhang bi 、qi kong kai zhang kuan du zhu jian jian shao ,er xian ti ge shu sui gan han xie pai jia chong cheng xian di zeng qu shi 。gan cao shou gan han xie pai cheng du de zeng jia ,xie pian tong guo diao jie qi kong de kai bi lai jian shao shui fen sun shi ,zai zhong du gan han xie pai shi ,gan cao de qi kong cheng xian shao liang qi kong guan bi de zhuang tai ,zai chong du gan han xie pai shi ,gan cao de qi kong zhu jian qing xiang yu guan bi 。you ci ke zhi ,sui zhao sheng jing de bian hua gan cao xie pian xing tai jie gou hui sui zhi gai bian ,zhe shi zhi wu zhu dong kuo ying huan jing de fang shi ,er ju dui gan han xie pai sheng jing de zhe chong zhu dong kuo ying ,ji neng di gao zhi zhu de kang han neng li ,you neng jiang di ji zai gan han huan jing xia suo shou dao de shang hai 。(4)sui zhao gan han xie pai cheng du de zeng jia ,gan cao you miao xie pian de Pn、Tr、he Gsdou cheng xian xian sheng gao hou jiang di de qu shi ,zai qing du gan han xie pai shi da dao zui gao ;er Cishi zhu jian shang sheng ,zai chong du gan han xie pai shi da dao zui da 。gan cao you miao xie pian de xie lu su han liang jiang di ,zhe shi gan cao tong guo jiang di xie pian zhong xie lu su han liang he gai bian guang ge te xing shi ji bi mian gan han xie pai dai lai de shang hai zuo chu de yi ji lie sheng li fan ying 。shui ming gan cao you yi ding de kang han xing ,chong du gan han tiao jian xia gan cao guang ge zuo yong neng li jiang di ,bing ju xian zhi gan cao you miao guang ge zuo yong de yin su shi you fei qi kong yin su dao zhi de 。(5)sui zhao gan han xie pai cheng du de zeng jia ,gan cao you miao xie pian de ke rong xing tang 、ke rong xing dan bai 、you li fu an suan jun cheng xian zhu jian sheng gao de qu shi ,shui ming gan cao zai gan han xie pai xia ju you yi ding de shen tou diao jie neng li 。tong guo ji lei shen tou diao jie wu zhi di gao xi bao de xi shui li he bao shui li 。(6)gan cao xie pian zhe tang 、pu tao tang 、guo tang han liang zai qing du gan han xie pai shi ji lei de tang zui duo ;er san chong tang zhong zhe tang han liang zui gao ,shui ming gan cao xie pian shi yi ji lei zhe tang wei zhu 。SPSyou jiao gao de huo xing ,cu jin le xie pian zhe tang de ge cheng 。SS-huo xing zai ge ge shui fen tiao jian xia yuan da yu SS+huo xing ,shui ming gan cao xie pian SSfen jie fang xiang zhan zhu yao zuo yong 。gan cao xie pian tang de ji lei yu xie zhong NI、AIhuo xing cheng xian zhe fu xiang guan 。NIhuo xing zai ge ge shui fen tiao jian xia yuan da yu AIhuo xing 。gan cao xie pian dian fen lin suan hua mei huo xing de bian hua cheng xian zhu jian di jian de qu shi ,yu dian fen han liang cheng fu xiang guan 。(7)zai shui fen zheng chang dui zhao xia ,zhe tang yu dian fen lin suan hua mei cheng zheng xiang guan xing ,dian fen yu NIcheng ji fu xiang guan xing 。zai qing du gan han xie pai shi ,pu tao tang yu SPScheng ji fu xiang guan xing ,yu dian fen lin suan hua mei cheng zheng xiang guan xing ;guo tang yu SPScheng ji fu xiang guan xing ,yu dian fen lin suan hua mei cheng ji fu xiang guan xing ,xiang guan ji shu wei -1.000;dian fen yu SS-cheng fu xiang guan xing ,yu AI,NIcheng ji zheng xiang guan xing 。zai zhong du gan han xie pai shi ,zhe tang yu AIcheng ji zheng xiang guan xing ;guo tang yu SPScheng zheng xiang guan xing ;dian fen yu SS-cheng zheng xiang guan xing ,yu dian fen lin suan hua mei cheng fu xiang guan xing 。zai chong du gan han xie pai shi ,pu tao tang yu SS-cheng ji zheng xiang guan xing ;guo tang yu dian fen lin suan hua mei cheng fu xiang guan xing ;dian fen yu SS+cheng ji zheng xiang guan xing ,yu NIcheng ji zheng xiang guan xing ,xiang guan ji shu wei 1.000。
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论文详细介绍
论文作者分别是来自内蒙古农业大学的张晗，发表于刊物内蒙古农业大学2019-10-08论文，是一篇关于甘草论文,水分胁迫论文,叶片形态结构论文,糖代谢论文,光合作用论文,内蒙古农业大学2019-10-08论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自内蒙古农业大学2019-10-08论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：甘草论文; 水分胁迫论文; 叶片形态结构论文; 糖代谢论文; 光合作用论文; 内蒙古农业大学2019-10-08论文;