CAJ | 학술논문

为了研究干旱胁迫下，小麦非结构性碳水化合物的改变率与干旱敏感系数的相关性。利用室内水培的方法，以6个抗旱性不同的小麦品种为试验材料，设置15% PEG和20% PEG 2个胁迫水平，以不添加 PEG 的正常营养液为对照，系统研究了不同干旱胁迫条件下小麦叶片和根系中主要非结构性碳水化合物含量的变化规律。结果表明，干旱胁迫明显降低了各小麦品种干物质量，6个小麦品种在不同干旱水平下的抗旱性均表现为晋麦47>矮抗58>周麦22>洛旱6号>郑麦9023>西农979；干旱胁迫下6个小麦品种叶片和根系中可溶性总糖、蔗糖、果糖、葡萄糖含量均随着干旱时间的增加呈先增加后降低的趋势，而淀粉和果聚糖含量则呈降低的趋势，复水后各非结构性碳水化合物含量逐渐恢复到对照水平；6个小麦品种中，干旱敏感性越高的品种，在干旱胁迫下其组织中各非结构性碳水化合物含量的改变率越小；干旱敏感系数与干旱胁迫下各非结构性碳水化合物含量的改变率均呈负相关性，其中可溶性总糖、果糖、淀粉、果聚糖含量在干旱胁迫下的改变率与干旱敏感系数的相关性达到显著水平。在干旱胁迫下，淀粉与果聚糖的水解对提高小麦抗旱性有重要作用。
위료연구간한협박하，소맥비결구성탄수화합물적개변솔여간한민감계수적상관성。이용실내수배적방법，이6개항한성불동적소맥품충위시험재료，설치15% PEG화20% PEG 2개협박수평，이불첨가 PEG 적정상영양액위대조，계통연구료불동간한협박조건하소맥협편화근계중주요비결구성탄수화합물함량적변화규률。결과표명，간한협박명현강저료각소맥품충간물질량，6개소맥품충재불동간한수평하적항한성균표현위진맥47>왜항58>주맥22>락한6호>정맥9023>서농979；간한협박하6개소맥품충협편화근계중가용성총당、자당、과당、포도당함량균수착간한시간적증가정선증가후강저적추세，이정분화과취당함량칙정강저적추세，복수후각비결구성탄수화합물함량축점회복도대조수평；6개소맥품충중，간한민감성월고적품충，재간한협박하기조직중각비결구성탄수화합물함량적개변솔월소；간한민감계수여간한협박하각비결구성탄수화합물함량적개변솔균정부상관성，기중가용성총당、과당、정분、과취당함량재간한협박하적개변솔여간한민감계수적상관성체도현저수평。재간한협박하，정분여과취당적수해대제고소맥항한성유중요작용。
In order to study the relationship between non-structure carbohydrate and drought sensitive coeffi-cient under drought stress. The variation of non-structure carbohydrate contents in leaves and roots of six wheat vari-eties were studied under two dought stress treatments(15% PEG and 20% PEG),taking the normal solution man-agement as control( CK ). The results displayed that the dry matter weight decreased under drought stress. The drought sensitivity of six wheat varieties was Jinmai 47(JM47)>Aikang 58(AK58)>Zhoumai 22(ZM22)>Luohan No. 6(LH6)>Zhengmai 9023(ZM9023)>Xinong 979(XN979)for both 15% PEG and 20% PEG treatments. The contents of total soluble sugar,glucose,fructose and sucrose increased first and then decreased with the extension of drought stress time,while the contents of starch and fructan decreased all the way. The non-structure carbohydrate contents in leaves and roots approximated the level of CK after rewatering. The varieties with higher drought sensitiv-ity had less change rate of non-structure carbohydrate contents. The drought sensitive coefficient had negative corre-lation with the change rate of non-structure carbohydrate contents. The correlations of drought sensitive coefficient with the change rate of soluble total sugar,fructose,starch and fructan was significant. The degradation of starch and fructan under drought stress played an important role in improving the drought resistance of wheat.