CAJ | 학술논문

对弱光胁迫下6份弱光耐性不同的黄瓜幼苗的叶片形态结构和光合特性进行研究,弱光光强为100 μmol(m~2·s)处理10 d,自然光强为300 μmol/(m~2·s).结果表明,不同的材料之间形态结构存在差异,耐弱光性材料组织结构紧密度大,组织结构疏松度小.海绵组织厚度与弱光性呈极显著负相关;组织结构紧密度与耐弱光呈显著正相关;组织结构疏松度与耐弱光性呈显著负相关.即栅栏组织在叶肉中所占比例越大,海绵组织在叶肉中所占比例越小,植物耐弱光性越强,反之,越不耐弱光.黄瓜幼茁叶片的光合特性与耐弱光性(耐弱光指数)有密切的关系,其中光补偿点、CO_2饱和点、CO_2补偿点与耐弱光指数呈极显著负相关性,相关系数分别为-0.91、-0.95、-0.97;光饱和点与耐弱光指数也呈负相关,但未达到显著性.
대약광협박하6빈약광내성불동적황과유묘적협편형태결구화광합특성진행연구,약광광강위100 μmol(m~2·s)처리10 d,자연광강위300 μmol/(m~2·s).결과표명,불동적재료지간형태결구존재차이,내약광성재료조직결구긴밀도대,조직결구소송도소.해면조직후도여약광성정겁현저부상관;조직결구긴밀도여내약광정현저정상관;조직결구소송도여내약광성정현저부상관.즉책란조직재협육중소점비례월대,해면조직재협육중소점비례월소,식물내약광성월강,반지,월불내약광.황과유촬협편적광합특성여내약광성(내약광지수)유밀절적관계,기중광보상점、CO_2포화점、CO_2보상점여내약광지수정겁현저부상관성,상관계수분별위-0.91、-0.95、-0.97;광포화점여내약광지수야정부상관,단미체도현저성.
Using six cucumber lines,the leaf morphology and photosynthesis characteristics of cucumber seedlings under low light were studied.The cucumber seedlings were treated with low light(intensity=100 μmol／m~2·s) for 10 days．The results showed that leaf morphology was different among these materials;the morphological structure of the low light tolerance cucumber materials had higher compaction degree and smaller osteoporosis degree.Spongy tissue thickness had highly significant negative correlation with low light toleralice.The compaction degree of morphological structure had a significant positive correlation with shading resistance index.The osteoporosis degree of morphological structure had significant negative correlation with shading resistance index.Consequendy.in the mesophyll,the mole palisade tissue and less spongy tissue pro-portion implied stronger resistance to low light.The photosynthesis characteristics of cucumber seeding leaves had closed relationship with tolerance of low light(low light tolerance index).Light compensation point,CO_2 saturation point and CO_2 compensation point had significant negative correlation with low light tolerance index,the relative index were-0.91,-0.95,-0.97,respectively.Light saturation point also had negative correla-tion with low light tolerance index,but it was not significant.