Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2019, Vol. 55 ›› Issue (6): 22-27.doi: 10.11707/j.1001-7488.20190603

• Articles • Previous Articles     Next Articles

Concentration and Distribution Pattern of Non-Structural Carbohydrate of Phyllostachys glauca in Different Limestone Habitats

Liang Kuan1,2,3, Fan Yan1,2, Feng Huoju4, Tan Taiteng4, Shi Jianmin1,2   

  1. 1. Forestry College of Jiangxi Agricultural University Nanchang 330045;
    2. Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization Nanchang 330045;
    3. Institute of Tropical Forestry, Chinese Academy of Forestry Gangzhou 510520;
    4. Ruichang Bureau of Forestry, Jiangxi Province Ruichang 333200
  • Received:2018-02-01 Revised:2018-10-15 Online:2019-06-25 Published:2019-07-11

Abstract: [Objective] This study aimed to investigate the concentration and distribution pattern of non-structural carbohydrate (NSC) in Phyllostachys glauca, a dominant species in limestone mountains, and the ecological significance.[Method]The NSC concentration and distribution characteristics of individual (whole plant)and component level (leaf, branch, stem, stump, rhizome and root) of P. glauca in three different soil moisture habitats (continuous soil, semi-continuous soil and sporadic soil) in the limestone mountain area of Northwest Jiangxi Province were measured and analyzed.[Result]The results showed that:1) At individual level, from continuous soil and semi-continuous soil to sporadic soil, the concentration of soluble sugars increased gradually with the decrease of soil water content, and the value in sporadic soil (3.32% ±0.20%) was significantly higher than that in continuous soil (2.52% ±0.17%) (P< 0.05). The starch and NSC concentration decreased initially and then increased, and the values in semi-continuous soil were all significantly lower than those in sporadic soil (P < 0.05). 2) At the component level, the concentration of NSC, soluble sugars and starch in leaves were the highest in the three habitats, followed by branches and roots, and relatively lower in stems, stumps and rhizomes. 3)With the decrease of soil water content, the increment of soluble sugars concentration in P. glauca roots was greater than that in other parts. Compared with the value in continuous soil habitat, that in semi-continuous soil and sporadic soil increased by 74.29%, and 39.35%, respectively. The distribution proportion of soluble sugars in the components with high physiological activity (leave and root) in sporadic soil habitat increased by 71.26% and 50.61%, respectively compared with that in continuous soil habitats, while the distribution proportion in the stored components of stems, stumps and rhizomes decreased.[Conclusion]Our studies indicate that P. glauca has a physiological mechanism to cope with drought stress by regulating the concentration and distribution of non-structural carbohydrate both at individual and component level. The NSC regulation behavior at the component level can reflect the physiological strategies of plants to cope with drought stress more deeply than that at the individual level.

Key words: Phyllostachys glauca, soluble sugar, starch, component, carbon distribution, bare rock rate, drought

CLC Number: