Wang Jian-Jian, Ji La-la, Deng Xiao-Hong, Lyu Li-Tang, Yu Li-Fei, Guan Ping
Key Laboratory of Innovation Education of Mountain Plant Resources Conservation and Germplasm,Center for Collaborative Innovation of Mountain Ecology and Agricultural Bioengineering,College of Life Sciences/Academy of Agricultural Bioengineering,Guizhou University Guiyang 550025,China.
Zhongguo Zhong Yao Za Zhi. 2019 Dec;44(23):5118-5123. doi: 10.19540/j.cnki.cjcmm.20191009.103.
The aim of this study was to study the effects of different light intensity on the growth,biomass accumulation and distribution,chlorophyll content and effective components of Uncaria rhynchophylla seedlings,and explore the suitable light intensity conditions for artificial cultivation of U. rhynchophylla seedlings. Three-year-old U. rhynchophylla seedlings were used as experimental materials. Four light intensity levels( 100%,70%-75%,30%-35%,5%-10%) were set up with different layers of black shading net. With the decrease of light intensity,the results showed that the plant height,basal diameter and biomass( root,stem,leaf and hook) of U.rhynchophylla seedlings exhibited the trend of " increase-decrease". Under 70%-75% light intensity,the plant height,basal diameter,biomass( root,stem,leaf,hook) of U. rhynchophylla seedlings were significantly higher than those of other treatments( P< 0. 05);under 5%-10% light intensity,the plant height,basal diameter and biomass( root,hook) of U. rhynchophylla seedlings were significantly lower than those of other treatments( P<0. 05). With the decrease of light intensity,the chlorophyll content of U. rhynchophylla seedlings increased gradually: under 100% light intensity,the chlorophyll content of U. rhynchophylla seedlings were the smallest,while under 100% light intensity,its chlorophyll content was the highest. With the decrease of light intensity,the contents of rhynchophylline and isorhynchophylline in different organs of U. rhynchophylla seedlings varied: under 30%-35% light intensity,the contents of rhynchophylline and isorhynchophylline in hooks and rhynchophylline content in stems were the highest; under 5%-10% light intensity,the contents of rhynchophylline and isorhynchophylline in leaves and stems of U. rhynchophylla were the highest. In conclusion,70%-75% light intensity is suitable for seedling growth and biomass accumulation,and 30%-35% light intensity is suitable for the accumulation of effective components in U. rhynchophylla seedlings.
本研究旨在探讨不同光照强度对钩藤幼苗生长、生物量积累与分配、叶绿素含量及有效成分的影响，探索钩藤幼苗人工栽培适宜的光照强度条件。以三年生钩藤幼苗为试验材料，通过不同层数的黑色遮阳网设置4个光照强度水平（100%、70%-75%、30%-35%、5%-10%）。结果表明，随着光照强度的降低，钩藤幼苗的株高、地径及生物量（根、茎、叶、钩）呈“增加-降低”趋势。在70%-75%光照强度下，钩藤幼苗的株高、地径、生物量（根、茎、叶、钩）显著高于其他处理（P<0.05）；在5%-10%光照强度下，钩藤幼苗的株高、地径及生物量（根、钩）显著低于其他处理（P<0.05）。随着光照强度的降低，钩藤幼苗叶绿素含量逐渐增加：在100%光照强度下，钩藤幼苗叶绿素含量最小，而在5%-10%光照强度下，其叶绿素含量最高。随着光照强度的降低，钩藤幼苗不同器官中钩藤碱和异钩藤碱含量有所变化：在30%-35%光照强度下，钩中钩藤碱和异钩藤碱含量以及茎中钩藤碱含量最高；在5%-10%光照强度下，钩藤叶和茎中钩藤碱和异钩藤碱含量最高。综上所述，70%-75%光照强度适宜钩藤幼苗生长和生物量积累，30%-35%光照强度适宜钩藤幼苗有效成分积累。
