摘要
采用镝灯人工光源,于温室内对盆栽的紫藤、美国凌霄、地锦、五叶地锦、山荞麦、扶芳藤、金银花进行了光-光响应曲线和CO2响应曲线的测定,对比分析了7种藤本植物的光补偿点(LCP)、光饱和点(LSP)、最大净光合速率(Pn)、最大表观量子效率(Φ)、CO2补偿点和RuBP羧化酶的相对活性,并对7种藤本植物Pn、Φ与植物耐荫性的相关关系及7种藤本植物CO2利用能力与耐荫性的相关关系进行了多元回归分析。结果表明,(1)7种藤本植物的光能利用特性不同。扶芳藤、金银花、五叶地锦的LCP和LSP都低,能够充分利用弱光并具有较强的耐荫性;山荞麦LCP较低,但LSP却较高,对有效光能辐射的利用范围较宽,对弱光具有一定的忍耐能力的同时又表现出一定的喜光性;地锦、紫藤、美国凌霄LCP高,同时LSP也较高,均为喜光藤本植物。(2)植物LCP高低是评价植物耐荫性能力的最直接指标,7种藤本植物LCP与Pn呈正相关,与Φ呈负相关;与CO2补偿点呈微弱的负相关,与RuBP羧化酶相对活性呈正相关关系。(3)7种藤本植物的耐荫能力由强到弱顺序为扶芳藤、金银花(五叶地锦)、山荞麦、紫藤、地锦、美国凌霄。
The light-light curve and CO_2 curve of 7 potted climbing shrub species,Wisteria sinensis, Euonymus fortunei,Parthenocissus tricuspidata, P. quinquefolia, Polygonum aubertii,Campsis radicans and Lonicera japonica, were determined by Dysprosium light illumination. Light compensation point (LCP), light saturation point (LSP), Pn,Φ,CO_2 compensation point and RuBisco relativity of the 7 climbing shrub species were analyzed comparatively. The correlation of shade tolerance with Pn,Φ and CO_2 utilization ability were discussed by multi-factor analyzing. The results showed that different climbing shrub specie had different light utilization characteristics. Euonymus fortunei, Lonicera japonica and Parthenocissus quinquefolia had low LCP, meanwhile they had lower LSP. They could use low light quantum, and had strong shaded-tolerance. Polygonum aubertii had limited shaded-tolerance because of its low LCP and high LSP, broader light quantum could be used effectively. Wisteria sinensis, Campsis radicans and Parthenocissus tricuspidata had higher LCP and LSP, they were sun climbing shrub. A significantly positive correlation was found between LCP and Pn ,LCP and RuBisco relativity. A negative correlation was found between LCP and Φ. The ability of shade-tolerance of the 7 climbing shrub species followed the order of Euonymus fortunei>Lonicera japonica=Parthenocissus quinquefolia>Polygonum aubertii>Wisteria sinensis>Parthenocissus tricuspidata>Campsis radicans.
出处
《林业科学研究》
CSCD
北大核心
2004年第3期305-309,共5页
Forest Research
基金
科技部十五攻关课题(2002BA516A15)部分内容
关键词
扶芳藤
紫藤
藤本植物
光能利用特性
耐荫性
Euonymus fortunei
Wisteria sinensis
Climbing shrub
light utilization characteristics
shade-tolerance