CO_2加富下空气湿度调控对亚高温大棚嫁接黄瓜逆境生理的影响  

THE EFFECT OF AIR HUMIDITY ON THE STRESS PHYSIOLOGY OF THE GRAFTED CUCUMBER IN SUB-HIGH TEMPERATURE PLASTIC TUNNEL UNDER CO_2 ENRICHMENT

作　　者：刘杰才[1] 崔世茂[1] 杨文秀[1] 马立国[1] 付崇毅[1] 刘维彬 杨正荣 白东升 

机构地区：[1]内蒙古农业大学农学院,呼和浩特010019 [2]呼和浩特市蔬菜科学研究所,呼和浩特010070 [3]呼和浩特市赛罕区蔬菜良种场,呼和浩特010070

出　　处：《内蒙古农业大学学报（自然科学版）》2012年第4期21-26,共6页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：国家自然科学基金项目(31060239);内蒙古自然科学基金重点项目(200508010302)

摘　　要：本试验在CO2加富,气温为30℃～35℃条件下,将空气湿度设置为95%±5%(L1),75%±5%(L2),55%±5%(L3)3个处理,研究了空气湿度调控对大棚嫁接黄瓜逆境生理的影响。结果表明:随着处理时间的延长,3个处理叶片中的渗透调节物质、丙二醛含量和保护酶活性均呈增加趋势,细胞质膜透性L2处理和L3处理增加,L1处理降低;随着处理空气湿度的降低,黄瓜叶片中的渗透调节物质、丙二醛含量、保护酶活性和细胞质膜透性均呈降低趋势。在处理第24d时,L1比L2、L3的可溶性蛋白含量降低了4.84%、8.18%,脯氨酸含量降低了31.83%、36.77%,可溶性糖含量降低了27.74%、32.52%、丙二醛含量降低了30.34%、32.38%,超氧化物歧化酶(SOD)活性降低了29.45%、37.75%,过氧化氢酶(CAT)活性降低了17.41%、17.41%,过氧化物酶(POD)活性降低了9.14%、44.87%;细胞质膜透性降低了80.75%和80.76%。说明大棚内在CO2加富条件下,在较高的空气湿度环境中,嫁接黄瓜遭受的逆境胁迫较小。进一步证明了亚高温管理大棚可提高嫁接黄瓜抵御逆境胁迫的能力,降低逆境胁迫的程度,缓解逆境对植株的伤害。The purpose was to study the effects of air humidity on tstress physiology of the grafted cucumber in sub - high temperature in plastic tunnel under CO2 enrichment. With the cucumber variety Jinchun 4 as the tested material, the cucmnber plants were made for 3 treatments of air humidity as 95% ± 5% （ L1 ）, 75% ± 5% （ L2 ）, 55% ＋ 5% （ L3 ） in sub - high temperature of 30 - 35℃ under CO2 enrichment respectively. The result showed osmoregulation substances, MDA and the cell protective enzymes activities was all increased with the decreased of air humidity and the treating days. Cell membrane permeability of cucumber leaves in treatment LI was decreased while in treatment L2 and L3 was increased with the treating days. Osmoregulation substances, MDA, the cell protective enzymes activities and cell membrane permeability of cucumber leaves was all decreased with the decreased of air humidity. The soluble protein of treatment L1 was decreased 4.84% and 8.18% respectively compared to Ia and L3 after treatment 24d. The same situation for proline content was decreased 31.83% and 77% ; soluble sugar was decreased 27.74% and 32.52% ; MDA was decreased 30.34% and 32.38% ; SOD activity was decreased 29.45% and 37.75% ; CAT activity was decreased 17.41% and 17.41% ; POD activity was decreased 9.14% and 44.87% ; cell membrane permeability of cucumber leaves was decreased 80.75% and 80.76%.These results illustrated that the grafted cucumber plants was protected from stress tolerance in higher air humidity with sub - high tein- perature plastic tunnel under CO2 enrichment. The ability of resistance stress tolerance of grafted cucumber plants was increased and the hurt of plants was alleviated by stress tolerance in higher air humidity with sub - high temperature under CO2 enrichment.

关 键 词：CO2 空气湿度 亚高温 黄瓜 逆境生理 

分 类 号：S63[农业科学—蔬菜学]