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.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
关键词
薏苡
光合特性
叶绿素
Coix lacryma-jobi L.
photosynthetic characteristics
chlorophyll
