• ISSN 1008-505X
  • CN 11-3996/S
江厚龙, 王瑞, 贾峰, 张均, 张正扬. 不同海拔下烤烟叶片全展后光合特性研究[J]. 植物营养与肥料学报, 2013, 19(6): 1483-1493. DOI: 10.11674/zwyf.2013.0625
引用本文: 江厚龙, 王瑞, 贾峰, 张均, 张正扬. 不同海拔下烤烟叶片全展后光合特性研究[J]. 植物营养与肥料学报, 2013, 19(6): 1483-1493. DOI: 10.11674/zwyf.2013.0625
JIANG Hou-long, WANG Rui, JIA Feng, ZHANG Jun, ZHANG Zheng-yang. Photosynthetic characteristics of full expansion leaves of flue-cured tobacco in different elevations[J]. Journal of Plant Nutrition and Fertilizers, 2013, 19(6): 1483-1493. DOI: 10.11674/zwyf.2013.0625
Citation: JIANG Hou-long, WANG Rui, JIA Feng, ZHANG Jun, ZHANG Zheng-yang. Photosynthetic characteristics of full expansion leaves of flue-cured tobacco in different elevations[J]. Journal of Plant Nutrition and Fertilizers, 2013, 19(6): 1483-1493. DOI: 10.11674/zwyf.2013.0625

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

  • 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(Pn)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Pn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。

     

    Abstract: Pot experiments were conducted at the altitudes of 500 m, 900 m 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 Zhongyan103 cultivar is highest because of the higher photosynthetic capacity in various elevations.

     

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