Seasonal variations of non-structural carbohydrates of young and middle-age Pinus armandii plantations

LI Zhiqi; WU Junwen; CHEN Gang; DUAN Guihe; WEN Chengjing

doi:10.7606/j.issn.1000-4025.20230635

Xibei zhiwu xuebao (May 2024)

Seasonal variations of non-structural carbohydrates of young and middle-age Pinus armandii plantations

LI Zhiqi ,
WU Junwen,
CHEN Gang ,
DUAN Guihe ,
WEN Chengjing

Affiliations

LI Zhiqi: Key Laboratory of Biodiversity Conservation in Southwest China , State Forestry Administration , Southwest Forestry University , Kunming 650224 , China ; Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China , Ministry of Education , Southwest Forestry University , Kunming 650224 , China
WU Junwen: Key Laboratory of Biodiversity Conservation in Southwest China , State Forestry Administration , Southwest Forestry University , Kunming 650224 , China ; Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China , Ministry of Education , Southwest Forestry University , Kunming 650224 , China
CHEN Gang: Key Laboratory of Biodiversity Conservation in Southwest China , State Forestry Administration , Southwest Forestry University , Kunming 650224 , China ; Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China , Ministry of Education , Southwest Forestry University , Kunming 650224 , China
DUAN Guihe: Key Laboratory of Biodiversity Conservation in Southwest China , State Forestry Administration , Southwest Forestry University , Kunming 650224 , China ; Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China , Ministry of Education , Southwest Forestry University , Kunming 650224 , China
WEN Chengjing: Key Laboratory of Biodiversity Conservation in Southwest China , State Forestry Administration , Southwest Forestry University , Kunming 650224 , China ; Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China , Ministry of Education , Southwest Forestry University , Kunming 650224 , China

DOI: https://doi.org/10.7606/j.issn.1000-4025.20230635
Journal volume & issue: Vol. 44, no. 5
pp. 782 – 791

Abstract

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[ Objective ] It is of great significance to explore the distribution of NSC ( non-structural carbohy- drate ) and their components in different organs with seasonal changes for revealing the mechanism of car- bon distribution in different age Pinus armandii . [ Methods ] The contents of NSC and their components in different organs of young and middle-aged P . armandii were determined by periodic sampling to explore the seasonal changes of P . armandii during the year. [ Results ] ( 1 ) The distribution pattern of NSC and their components in different age P . armandii was the same among all organs , where the starch content was in the order : Roots > leaves > branches > stems. The starch content in stems was significantly low- er than that in other organs , while the content of soluble sugar and NSC in leaves , roots and branches was not significantly different. The ratio of sugar to starch in stems was significantly higher than that in other organs. ( 2 ) During the growing season , NSC and their components were mainly affected by seasons , fol- lowed by the interaction between seasons and organs , and the influence of forest age was the least. ( 3 ) The correlation between NSC and their components in different P . armandii organs was the same. Except the negative correlation between the ratio of sugar to starch and starch , NSC in young-aged P . armandii and the ratio of sugar to starch and starch in middle-aged P . armandii , the other indexes were positively correlated. [ Conclusion ] NSC and their components in various organs of P . armandii had obvious season- al fluctuations. When the environment changed , the carbon supply and demand of different organs changed synergistically , which was conducive to the growth of P . armandii , and enhanced its resistance and adaptability to cope with extreme environment.

Published in Xibei zhiwu xuebao

ISSN: 1000-4025 (Print)
Publisher: Science Press
Country of publisher: China
LCC subjects: Science: Biology (General); Science: Botany
Website: http://xbzwxb.alljournal.net/xbzwxben/home

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