摘要
为探明大花蕙兰开花期的光合日变化特性,采用Li-6400便携式光合作用测定系统研究大花蕙兰开花期的光合日变化。结果表明:红霞、金茉莉的Pn、Tr和Cond日变化曲线均呈双峰型,13:00左右存在明显的光合午休现象,但不同品种Pn、Tr和Cond的高峰和低谷出现的时间和高低不同。金茉莉的Pn、Tr优于引进品种红霞。推测2个品种的光合作用的限制因子主要是气孔因素。
The photosynthetic diurnal variation of Hybrid Cymbidium at flowering stage was determined by Li-6400 portable photosyntometer to study the characteristics of photosynthetic diurnal variation.The results showed that the diurnal variation of Pn,Tr and Cond of Hongxia and Jinmoli varieties presented a double-peak curve with ＂midday rest＂ phenomenon at about 13：00,but there were difference in appearing time and peak value of highest and lowest peak,and the Pn and Tr of Jingmoli variety were higher than Hongxia variety.It was speculated that the Cond is the main limited factor affecting photosynthesis of two tested Hybrid Cymbidium varieties.
出处
《贵州农业科学》
CAS
北大核心
2010年第8期40-42,共3页
Guizhou Agricultural Sciences
基金
贵州省科技创新人才团队项目"贵州省特色植物资源保护与可持续利用科技创新人才团队"[黔科合人才团队(2009)4007]
关键词
大花蕙兰
日变化
蒸腾速率
气孔导度
Hybrid Cymbidium
diurnal variation
transpiration rate
Cond
