云南文山10个薏苡品种光合特性分析  

Photosynthesis Characteristics of Ten Varieties of Coix lacryma-jobi L. in Wenshan Prefecture,Yunnan Province

作　　者：杨志清[1] 张世鲍 蒙海铁 何金宝 

机构地区：[1]云南农业大学农学与生物技术学院云南省优势中药材规范化种植工程研究中心,云南昆明650201 [2]云南文山州农科院,云南文山663000

出　　处：《云南农业大学学报（自然科学版）》2015年第3期440-444,共5页Journal of Yunnan Agricultural University:Natural Science

基　　金：云南省科技厅基金项目(2011FB055);云南省科技计划项目(2014RE002)

摘　　要：以云南文山县开化镇州农科院试验基地栽培的10个(Y9-7,Y12-2白,Y3-1,Y3-4,Y6-1,Y12-2黑,Y7-1,YLO,YGL-12,YWS-2)薏苡品种为研究对象,测定并分析其光合特性和叶绿素质量分数,研究不同薏苡品种间的光合差异,为薏苡品种的筛选提供理论支持。结果表明:Y12-2黑的净光合速率均高于其他9个品种,Y3-1最低。薏苡各品种的净光合速率、蒸腾速率、气孔导度日变化均呈单峰曲线,净光合速率在上午11:00达最大值,下午呈逐渐下降,蒸腾速率和气孔导度都是在15:00达到最大值;而胞间CO2浓度日变化是上午9:00时最高,表现为"高—低—稍高—低"的变化趋势。Y12-2黑的叶绿素a,b质量分数最高,Y7-1的叶绿素a质量分数最低,Y3-1的叶绿素b质量分数最低。Ten varieties [Y9-7, Y12-2 （white）, Y3-1, Y3-4, Y6-1, Y12-2 （black）, Y7-1, YLO, YGL-12, YWS-2] of Coix lacryma-jobi L. cultivated in Wenshan Prefecture, Yunnan Prov- ince were used as materials, and their photosynthetic characteristics and chlorophyll mass fractions were determined to study the photosynthetic differences amotlg different C. lacryma-jobi varieties and to provide theoretical support for the selection. The results show that： the net photosynthetic rate of Y12-2 （black） was higher than those of the other nine varieties, of which that of Y3-1 was the low- est. The net photosynthetic rates, transpiration rates and stomatal conductance of all varieties presen- ted single peak curve; the net photosynthetic rate reached the maximum at 11：00 a. m. and gradual- ly decreased at the afternoon; the stomatal conductance and transpiration rate reached the maximum at 3：00 p. m. , while the intercellular CO2 concentration reached the maximum at 9：00 a. m. , which displayed ＂high -low -higher -lower＂ trend. The chlorophyll a and b contents of Y12-2 black were the highest, the chlorophyll a content of Y7-1 was the lowest and the chlorophyll b content of Y3-1 was the lowest.

关 键 词：薏苡 光合特性 叶绿素 

分 类 号：S519[农业科学—作物学]