摘要
为了探明弱光条件下东方百合的生长发育及光合特性,为我国北方地区东方百合切花的耐弱光品种选育提供依据,以东方百合品种‘Marcopolo’、‘Tiber’、‘Constanta’和‘Acapulco’为试验材料,在整个生长季对其进行不同遮光处理(正常光照、50%遮光、75%遮光),测定不同光强下各品种光合参数及生长发育指标。结果表明:75%遮光条件下东方百合各品种的净光合速率(Pn)、光补偿点(LCP)、光饱和点(LSP)、暗呼吸速率(Rd)降低,表观量子效率(AQY)下降,叶绿素含量增高,叶绿素a与叶绿素b的比值降低,比叶质量减小,叶面积增大,切花观赏品质有所下降;不同百合品种的耐弱光性不同,弱光下‘Marcopolo’的LCP、Rd较低,比叶质量较小,AQY变化幅度小,表现出较强的耐弱光性;相反地,‘Acapulco’则对弱光较敏感。
To provide a theoretical basis for lily breeding of low light tolerance,we studied the developmental and photosynthetic characteristics of Lilium Oriental hybrids,i.e.‘Marcopolo’,‘Tiber’,‘Constanta’ and ‘Acapulco’,under different shade treatments,i.e.natural light,50% shade and 75% shade.The photosynthetic parameters and growth indices of different hybrids were measured under different light intensities.The results showed that with 75% shade,the net photosynthetic rate （ Pn ）,light compensation point （LCP）,light saturation point （LSP）,dark respiration rate （Rd）,apparent quantum yield （AQY）,the chlorophyll a /b （ Chl a /b） and specific leaf mass （ SLM） all decreased,while the chlorophyll content and leaf area increased.The tolerance to low-light stress was different among the four hybrids.The LCP,Rd and SLM of ‘Marcopolo’were lower than those of the other three hybrids,with small variations of AQY.These suggest that ‘Marcopolo’ has greater tolerance to low light,while ‘Acapulco’is sensitive to low light.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2010年第4期213-217,共5页
Journal of Beijing Forestry University
基金
"948"国家林业局引进项目(2006-4-C08)
关键词
东方百合
弱光
生长发育
光合特性
Lilium Oriental hybrids
low light
growth and development
photosynthetic characteristics
