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遮光对3种地被植物生长和生理生化的影响
引用本文:徐召丹,林夏珍,蒋挺.遮光对3种地被植物生长和生理生化的影响[J].浙江林学院学报,2010,27(1):69-75.
作者姓名:徐召丹  林夏珍  蒋挺
作者单位:浙江林学院,园林学院,浙江,临安,311300
摘    要:对花叶玉簪甜心Hosta × hybrida ‘So Sweet’,花叶蜘蛛抱蛋Aspidistra elatior‘Punctata’和白穗花Speirantha gardenii等3种地被植物进行不同程度遮光处理,研究了遮光条件下3种植物形态指标、叶片叶绿素质量分数、丙二醛(MDA)质量摩尔浓度和保护酶活性的变化。结果表明:在遮光处理下,3种植物形态指标都显著高于对照(全光照),花叶玉簪甜心在遮光75%下达到最大值,花叶蜘蛛抱蛋和白穗花在遮光90%下达到最大值。3种植物叶片叶绿素a、叶绿素b质量分数均较对照显著升高,以白穗花的增幅最大。叶绿素a/b比值显著下降,以白穗花的降幅最大。3种植物丙二醛质量摩尔浓度变化呈先下降后上升的趋势,但均显著低于对照;3种植物的超氧化物歧化酶(SOD)活性均显著低于对照,花叶玉簪甜心叶片的SOD活性先下降后上升,花叶蜘蛛抱蛋和白穗花叶片的SOD活性呈缓慢下降的趋势;花叶玉簪甜心和花叶蜘蛛抱蛋过氧化物酶(POD)活性变化均为先下降后上升,白穗花叶片的POD活性在遮光50%时下降,而到遮光75%时又明显上升,后又下降。通过隶属函数法综合分析可知,3种地被植物的耐荫性由强到弱为:白穗花>花叶蜘蛛抱蛋>花叶玉簪甜心。图3表3参22

关 键 词:森林生物学  地被植物  遮光  形态指标  生理生化指标  隶属函数法

Shading with growth, physiological indexes,biochemical indexes of three ground-cover plants
XU Zhao-dan,LIN Xia-zhen,JIANG Ting.Shading with growth, physiological indexes,biochemical indexes of three ground-cover plants[J].Journal of Zhejiang Forestry College,2010,27(1):69-75.
Authors:XU Zhao-dan  LIN Xia-zhen  JIANG Ting
Institution:(School of Landscape Architecture, Zhejiang Forestry College, Lin'an 311300, Zhejiang, China)
Abstract:Changes in morphological indexes, chlorophyll mass fraction, malondialdehydel (MDA) molal concentration and protective enzyme activities of Hosta × hybrida 'So Sweet', Aspidistra elatior 'Puncta-ta', Speirantha gardenii with shading treatments of 50%, 75%, 90% and a control of 0% were studied us-ing the subordination function method. Results showed that the morphological indexes of the three plants were significantly higher (P<0.05) than the control. Indexes of H. × hybrida 'So Sweet' were greatest with 75% shading, but the indexes of A. Elatior 'Punctata' and S. Gardenii were largest with 90% shading. The mass fraction of chlorphyll a (Chl a) and chlorphyll b (Chl b) for shading treatments were significantly higher(P<0.05) than the control and the increased range of S. Gardenii was biggest. Chl a/Chl b was signifi-cantly lower (P<0.05) than the control and the decreased range of S. Gardertii was biggest. Malondialde-hyde (MDA) molal concentration was significantly lower (P<0.05) with shading treatments than the con-trol. The changes of superoxide dismutase (SOD) activities of H. × hybrida 'So Sweet' decreased first and then increased, while those of A. Elatior 'Punctata' and S. Gardertii gradually decreased. With increased shading, changes in peroxidase(POD) activities of H. × hybrida "SO Sweet' and A. Elatior 'Punctata' de-creased to a certain degree and then increased. POD activities of S. Gardenii decreased with 50% shading, but increased with 75% shading and then decreased. According to the subordination function method, shade tolerance of the three plants was in the order: Speirantha gardenii>Aspidistra elatior 'Punctata' >Hosta × hybrida 'So Sweet'.
Keywords:forest biology  ground-cover plants  shading  morphological indexes  physiological and bio-chemical indexes  subordination function method
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