不同海拔下烤烟叶片全展后光合特性研究  

Photosynthetic characteristics of full expansion leaves of flue-cured tobacco in different elevations

作　　者：江厚龙 王瑞[2] 贾峰[3] 张均[4] 张正扬 

机构地区：[1]重庆烟草科学研究所,重庆400715 [2]湖北省烟草公司恩施州公司,湖北恩施445000 [3]河南工业大学生物工程学院,河南郑州450001 [4]河南科技大学,河南洛阳471003 [5]江西省烟草公司,江西南昌330025

出　　处：《植物营养与肥料学报》2013年第6期1483-1493,共11页Journal of Plant Nutrition and Fertilizers

基　　金：湖北省科技厅科技攻关项目"清江流域优质烟叶基地开发与工业利用研究"(2006AA201C73)资助

摘　　要：在湖北省恩施州选择同一山脉的3个不同海拔点(500 m、900 m、1300 m)进行盆栽试验,研究了3个不同基因型烤烟品种K326、云烟87、中烟103在不同海拔下烤烟叶片全展后的光合特性。结果表明,同一海拔下,各品种烤烟的净光合速率(P n)在叶片全展时达到最高,随后逐渐下降,随着海拔升高,烤烟叶片光合功能衰退减慢,光合功能期延长,光合生产能力增加。RuBPCase初始活性下降是导致烤烟叶片全展后P n下降的主要因素。烤烟叶片全展后叶绿体结构逐步解体,且海拔越高开始解体的时间越晚。供试三个品种,以中烟103在试验各海拔点均表现出较高的光合生产能力,为高光效品种。Pot experiments were conducted at the altitudes of 500 m, 900m and 1300 m in Enshi Autonomous Prefecture of Hubei to study the differences of photosynthetic characteristics of flue-cured tobacco cultivars with genotypes K326, Yunyan87 and Zhongyan103.The result show that the net photosynthetic rates （ Pn ） are maximum at full expansion of leaves of the flue-cured tobacco at various altitudes in Enshi , then decrease gradually , which is non-stomatal limitation that causes the decrease of Pn .With the increase of planting altitude , photosynthetic function of leaves is declined more slowly , the photosynthetic function period is prolonged , and the photosynthetic capacity of leaves is raised .Compared with the change of the chlorophyll content , the decrease of activities of RuBPCase is the main factor of the decline of photosynthetic function in tobacco leaves . The chloroplast microstructure is disintegrated gradually after the full expansion of leaves , and with the rising of the altitude , the start time of descending of chloroplast microstructure is delayed .The photosynthetic efficiency of the Zhongyan 103 cultivar is highest because of the higher photosynthetic capacity in various elevations .

关 键 词：海拔 烤烟 光合特性 

分 类 号：S572[农业科学—烟草工业]