欢迎访问《农学学报》，
农学学报

农学学报 ›› 2012, Vol. 2 ›› Issue (6): 6-9.

所属专题： 棉花

• 农艺科学 作物遗传育种 生理生化 • 上一篇    下一篇

花铃期棉花光合日变化研究

卢成达 郭志利   

  • 收稿日期:2011-12-27 修回日期:2012-05-23 出版日期:2012-06-20 发布日期:2012-06-20
  • 基金资助:

    山西省科技攻关项目;山西省农业科学院重点招标项目

Studies on Daily Changes of the Net Photosynthetic Rate of Cotton at Blossoming and Boll Forming Stage

  • Received:2011-12-27 Revised:2012-05-23 Online:2012-06-20 Published:2012-06-20

PDF (PC)

1655

摘要：

光合作用是决定作物产量的重要因素，进行棉花光合日变化特性研究，对于探究棉花干物质积累规律和增产机理均有很大的指导意义。采用CB-1102型光合蒸腾作用测定系统，研究棉花花铃期光合指标的日变化规律。结果表明，净光合速率(Pn)的日变化曲线为光合日变化模式之一的双峰型，光合速率的峰值分别出现在10:00时和15:00时，13:00时左右出现午休现象。蒸腾速率的日变化规律呈双峰型，峰值出现在11:00时和15:00时左右。气孔导度(Cleaf)的日变化规律也呈双峰型曲线，峰值出现在10:00时（小峰值）和15:00时左右（大峰值）。胞间CO2浓度呈现斜“V”字型的日变化规律，12:00时为全天最低值。

关键词: 速食小米粥, 速食小米粥, 加工, 氨基酸, 酚酸, 黄酮, 抗氧化活性

Abstract:

Photosynthesis is the important factors for yield formation, research on Diurnal Variation of Photosynthesis have guiding value for exploration the Rule of dry matter accumulation and yield-increasing mechanism of cotton. With CB-1102 Portable Photosynthetic System, the photosynthetic rate of cotton leaf was studied at blossoming and boll forming stage. The results showed that daily changes of net photosynthetic rate presented a bimodal curve, peak value appeared at 10:00 and 15:00, midday depression appeared at 13:00; transpiration rate presented a bimodal curve, peak value appeared at 11:00 and 15:00; stomatal conductance presented a bimodal curve, peak value appeared at 10:00 (small) and 15:00 (maximum peak); Variation of intercellular CO2 concentration appeared “V” shape, lowest value appeared at 12:00.