摘要
【目的】探讨人工干扰对实心竹(Phyllostachys heteroclada f. solida)光合色素和碳水化合物含量及其相互关系的影响,揭示人工干扰对实心竹生理过程的潜在影响机制。【方法】通过对比人工干扰与自然生长处理下实心竹叶片的光合色素(叶绿素a、b、a+b、a/b、类胡萝卜素)、碳水化合物(纤维素、木质素、淀粉、可溶性糖)含量及其相互关系,结合主成分分析(PCA),探讨不同处理下实心竹叶片碳水化合物分配及光合能力的差异。【结果】与自然生长相比,人工干扰处理后,实心竹叶片叶绿素a、b、a+b和类胡萝卜素含量分别减少了3.34%、5.83%、3.90%和0.36%,而叶绿素a/b比值增加了2.66%。在碳水化合物方面,实心竹在人工干扰下比自然生长显著提高了叶片的纤维素含量(+8.58%)和结构性碳水化合物总量(+3.81%),同时显著减少了木质素含量(-3.47%),纤维素/木质素比值显著增加4.95%(P<0.05)。此外,人工干扰略微增加了淀粉含量(+0.76%),但可溶性糖和非结构性碳水化合物的含量有所减少,且各项碳水化合物比值下降。PCA分析表明,人工干扰后光合色素含量与非结构性碳水化合物呈正相关,而结构性碳水化合物的积累量与光合色素含量呈负相关性。【结论】人工干扰显著改变了实心竹的光合色素和碳水化合物含量。竹子通过调整光合色素比例和增加纤维素合成,优化了能量储备,从而提高了对环境变化的适应能力。
【Objective】This study aims to investigate the effects of artificial disturbance on the content of photosynthetic pigments and carbohydrates in the leaves of solid bamboo(Phyllostachys heteroclada f.solida)and their interrelationships,and to reveal the potential impact mechanisms of artificial disturbance on the physiological processes of Ph.heteroclada f.solida.【Method】Through the comparison of the effects on the content and also the mutual relationship under artificial disturbance and natural growth of photosynthetic pigments(chlorophyll a,b,a+b,a/b,and carotenoids)and carbohydrates(cellulose,lignin,starch,and soluble sugars)in the leaves of solid bamboo,combining principal component analysis(PCA),the study is to explore the changes in carbohydrate distribution and photosynthetic performance under different treatments.【Result】Compared with natural growth,after artificial disturbance,the content of chlorophyll a,b,a+b,and carotenoids significantly decreased by 3.34%,5.83%,3.90%,and 0.36%,respectively,while the chlorophyll a/b ratio increased by 2.66%.In terms of carbohydrates,the artificial disturbance significantly increased the cellulose content(+8.58%)and the total amount of structural carbohydrates(+3.81%)than the natural growth,while lignin content decreased by 3.47%,the cellulose/lignin ratio increased by 4.95%(P<0.05).Additionally,starch content showed a slight increase(+0.76%),but both soluble sugars and non-structural carbohydrates decreased,accompanied by a reduction in carbohydrates ratios.PCA analysis indicated that after the artificial disturbance,photosynthetic pigments and non-structural carbohydrates appear to be in a positive correlation,while the accumulation of structural carbohydrates and the content of photosynthetic pigments appear to be in a negative correlation.【Conclusion】Artificial disturbance significantly altered the content of photosynthetic pigments and carbohydrates in Ph.heteroclada f.solida.By adjusting the ratio of photosynthetic pigments and enhancing cellulose synthesis,bamboo optimized its energy reserves,thereby improving its ability to adapt to environmental changes.
作者
胡华斌
凡莉莉
陈双林
郭子武
胡瑞财
HU Hua-bin;FAN Li-li;CHEN Shuang-lin;GUO Zi-wu;HU Rui-cai(Longyou County Forestry Technology Extension Station,Quzhou 324400,Zhejiang,China;Subtropical Forestry Research Institute,Chinese Academy of Forestry,Hangzhou 311400,Zhejiang,China)
出处
《竹子学报》
2025年第3期24-30,共7页
Journal of Bamboo Research
基金
中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2022SY013)。
关键词
实心竹
人工干扰
叶片
光合色素
纤维素
非结构性碳水化合物
Phyllostachys heteroclada f.solida
Artificial disturbance
Leaves
Photosynthetic pigments
Cellulose
Non-structural carbohydrates
