CAJ | 학술논문

为了探讨玉米不同自交系对UV-B辐射增强的响应，在摸拟光照培养条件下，研究了增强UV-B辐射对玉米不同自交系气体交换参数的影响。结果表明，五叶期UV-B辐射处理6 d后，供试的48个自交系中近一半以上材料的幼苗叶片光合速率、气孔导度和蒸腾速率显著降低10％以上，其材料比例分别为64．6％，47．9％，54．2％；而有62.5％的材料胞间CO2浓度表现为显著增加；相关分析发现，气孔导度与蒸腾速率对UV-B辐射增强的响应值间存在极显著正相关关系；根据气体交换参数对UV-B辐射增强的响应程度将48个材料分成6类，其中对增强UV-B辐射反应比较敏感的材料和能够忍耐UV-B辐射增强的材料均占12．5％。说明玉米不同自交系幼苗叶片气体交换参数对UV-B辐射增强反应敏感程度具有显著的基因型差异，从中能够筛选出对UV-B辐射增强反应敏感和有忍耐能力的材料。
위료탐토옥미불동자교계대UV-B복사증강적향응，재모의광조배양조건하，연구료증강UV-B복사대옥미불동자교계기체교환삼수적영향。결과표명，오협기UV-B복사처리6 d후，공시적48개자교계중근일반이상재료적유묘협편광합속솔、기공도도화증등속솔현저강저10％이상，기재료비례분별위64．6％，47．9％，54．2％；이유62.5％적재료포간CO2농도표현위현저증가；상관분석발현，기공도도여증등속솔대UV-B복사증강적향응치간존재겁현저정상관관계；근거기체교환삼수대UV-B복사증강적향응정도장48개재료분성6류，기중대증강UV-B복사반응비교민감적재료화능구인내UV-B복사증강적재료균점12．5％。설명옥미불동자교계유묘협편기체교환삼수대UV-B복사증강반응민감정도구유현저적기인형차이，종중능구사선출대UV-B복사증강반응민감화유인내능력적재료。
To explore responses of maize seedlings in different inbreed lines to enhanced ultraviolet -B radia-tion,48 inbreed lines were planted in artificial culturing room with 2 treatment groups .One group is the control and another group was treated with enhanced UV-B dose in 57 .8 μW/cm2 after 5 leaf stage .Using a portable TPS-2 photosynthetic analysis system ,the photosynthetic rate (A),stomatal conductance (G),intercellular CO2concentra-tion ( Ci) and transpiration rate ( E) were recorded after six days of treatment .Results indicated that in most of test material,the leaf A,G,and E were increased above 10% under UV-B treatment and their percentage in 48 lines were 64.6%,47.9% and 54.2%,respectively.However,leaf E in 62.5% lines was reduced above 10% under UV-B treatment .There is significant correlation between the responses of G and E .The test inbreed lines was divid-ed into six categories based on their performances to UV-B treatment .There were 12 .5% inbreed lines with high sensitive and tolerance to enhanced UV-B radiation,respectively.It can be concluded that there is significant geno-type difference for the sensitivity of maize inbreed line to enhanced UV-B radiation and the materials with high sen-sitive or tolerance to enhanced UV-B radiation could be obtained .