| 摘要: |
| [目的]探讨不同光照条件对红叶石楠叶色变化的影响,为红叶石楠的广泛引种栽培及在不同园林环境中的应用提供科学依据.[方法]以2年生红叶石楠扦插苗为试材,采用盆栽试验,设置透光率分别为100%(全光照),80%,50%和25%,研究4种遮光处理条件下红叶石楠叶片中光合色素、花色素苷和可溶性糖含量及苯丙氨酸解氨酶(PAL)活性的变化.[结果]红叶石楠叶片中光合色素含量随透光率减小而增加,25%透光率下光合色素含量极显著高于其他透光率(PP<0.05),二者均随透光率减小而降低;25%透光率下红叶石楠叶片中可溶性糖含量极显著低于其他遮光处理(P<0.01),且随透光率增加而升高.[结论]遮光条件下红叶石楠叶片中光合色素含量增加,叶色较浅或全绿;全光照条件下最有利于叶片中可溶性糖和花色素苷的积累及PAL活性的提高,叶色保持红艳. |
| 关键词: 红叶石楠 光照条件 透光率 叶色变化 |
| DOI： |
| 分类号: |
| 基金项目:河北省农开办农业综合开发土地治理科技项目（冀财发［2005］14号） |
|
| Effect of different shading treatments on the leaf color expression of Photinia frasery Dress |
|
|
| Abstract: |
| 【Objective】 The leaf color changes of Photinia frasery Dress under different light circumstances were discussed in this experiment.【Method】 With the method of potting,2-year-old cutting plants were used as material to study the contents of photosynthetic pigment,anthocyanin,soluble sugar and activity of phenylaJanine ammonia-lyase(PAL) in Photinia frasery Dress leaves under four shading treatments(100%,80%,50% and 25% transmission rate).【Result】 The contents of photosynthetic pigment increased gradually with the lowering of the transmission rate,under 25% transmission rate it was extremely remarkably higher than other transmission rates(P＜0.01);The contents of the anthocyanin and the PAL activity under full light were significant higher than that of other transmission rates(P＜0.05),and they all degreased with the drop of the transmission rate;The soluble sugar content under 25% transmission rate was extremely remarkably lower than other that at transmission rates(P＜0.01),Its contents rose as transmission rate increased.【Conclusion】 The contents of photosynthetic pigment increased under shading treatments,the leaf color expressed light-colored or green.The full light was in favor of the accumulation of the soluble sugar，anthocyanin and the promotion of the PAL activity,and the leaves remained fresh red. |
| Key words: Photinia frasery Dress light circumstances transmission rate change of leaf color |
