干旱胁迫对小黑麦生物量及淀粉特性影响的研究  

Effects of drought stress on triticale biomass,starch composition and morphology

作　　者：何江峰[1] 陆振翔 朱树声 赵萌莉[1] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010019 [2]加拿大农业-农业食品部列桥研究中心 [3]内蒙古牙克石市草原工作站,022150

出　　处：《干旱区资源与环境》2013年第6期102-106,共5页Journal of Arid Land Resources and Environment

基　　金：公益性行业(农业)科研专项经费(201003023);科技部科技支撑项目(2012BAD13B02);内蒙古农业大学草业与草地资源重点实验室资助

摘　　要：以3个小黑麦品种AC Certa、AC Ultima和Blue Alta为实验材料,通过测定轻度、中度及重度干旱胁迫下小黑麦的生物量、淀粉组成及淀粉颗粒形态的变化,探讨干旱胁迫对小黑麦生物量及淀粉特性影响的研究。结果表明:小黑麦生物量及淀粉特性在不同程度的干旱胁迫下变化不一,其中小黑麦的干重在中度及重度干旱胁迫下显著下降,单粒重和总淀粉含量(P<0.05)在重度干旱胁迫下分别显著下降35-46.8%和9.6-18.3%;而直链淀粉含量在中度干旱胁迫下显著(P<0.05)增加5.5-16.5%。小黑麦A、B型淀粉颗粒的比例和淀粉颗粒表面蜂窝状小孔的密度随干旱胁迫程度的加强显著增加(P<0.05),C型淀粉颗粒的比例显著下降(P<0.05)。In the study, Biomass, total starch , starch composition and starch morphology of three triticales varieties （AC Certa, AC Uhima and Blue Aha ） were investigated in response to gentle , moderate and severe drought stress, consquently, the effects of drought stress on triticale biomass and triticale starch characters were learned. The results indicated that the single grain weight and total starch were decreased in response to severe drought stress（P 〈0.05）, and it decreased 35 -46.8% and 9.6 - 18.3% ,respectively. The amylose content was significantly increased under moderate drought stress（ P 〈0.05）, and it increased 5.5 -16.5%. The proportions of A - and B - types of starch granules and cellular ostiole density on starch were significantly increased in response to severe drought stress, then C - type starch granules were significantly decreased （ P 〈 0.05 ）.

关 键 词：小黑麦 干旱胁迫 淀粉 

分 类 号：Q945.78[生物学—植物学]