不同光照度对商洛丹参生长和叶片生理指标的影响

旨在探讨不同光照度对商洛丹参生长和叶片生理指标的影响,测定商洛道地丹参不同生育期(幼苗期、开花期和生长减缓期)叶片在不同遮光处理下(遮光率为40%～50%、50%～70%、70%～80%和85%～95%)生长指标和叶片生理指标的动态变化。结果表明,遮光率为40%～50%时,株高、主茎数、单株鲜质量和根鲜质量最大;随遮光率增加超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性和脯氨酸质量分数遮光率呈增加趋势,可溶性糖和可溶性蛋白质量分数先增后减。综合全生育期来看,遮光率为50%更适合商洛丹参生长。

Effect of Different Light Intensity on the Growth and Leaf Physiological Index of Salvia miltiorrhiza in Shangluo

The purpose of this study is to investigate the effects of different light intensities on the growth and leaf physiological indexes of Shangluo genuine crude S.miltiorrhiza.Growth indexes of leaves and leaf physiological indexes were determined at different growth stages (seedling , flowering and growth under different shading rates of 40%-50%, 50%-70%, 70%-80% and 85%-95% of natural light). The results showed that the plant height, main stem number, fresh weight per plant and root fresh mass were the highest when the shading rate was 40%-50% of natural light; superoxide dismutase (SOD), hydrogenase (CAT), peroxidase (POD) and proline increased in an overall trend compared with trend of the CK(40%-50%, 50%-70%, 70%-80%, 85%-95%) while soluble sugar mass fraction and soluble protein mass fraction increased first and then decreased. Generally, the 50 % shading rate was more suitable for the growth of Shangluo genuine crude S. miltiorrhiza.