The effects of drought stress on the stoichiometric characteristics of C, N, and P in Pinus yunnanensis seedlings

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

doi:10.7606/j.issn.1000-4025.20230670

Xibei zhiwu xuebao (Jul 2024)

The effects of drought stress on the stoichiometric characteristics of C, N, and P in Pinus yunnanensis seedlings

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

Affiliations

WEN Chengjing: 1 College of Forestry, Southwest Forestry University, Kunming 650224, China; 2 Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Southwest Forestry University, Kunming 650224, China; 3 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224,China
WU Junwen: 1 College of Forestry, Southwest Forestry University, Kunming 650224, China; 2 Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Southwest Forestry University, Kunming 650224, China; 3 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224,China
JING Huiqing: 1 College of Forestry, Southwest Forestry University, Kunming 650224, China; 2 Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Southwest Forestry University, Kunming 650224, China; 3 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224,China
CHEN Gang: 1 College of Forestry, Southwest Forestry University, Kunming 650224, China; 2 Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Southwest Forestry University, Kunming 650224, China; 3 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224,China
LI Zhiqi: 1 College of Forestry, Southwest Forestry University, Kunming 650224, China; 2 Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Southwest Forestry University, Kunming 650224, China; 3 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224,China
DUAN Guihe: 1 College of Forestry, Southwest Forestry University, Kunming 650224, China; 2 Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Southwest Forestry University, Kunming 650224, China; 3 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224,China

DOI: https://doi.org/10.7606/j.issn.1000-4025.20230670
Journal volume & issue: Vol. 44, no. 7
pp. 1129 – 1140

Abstract

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Abstract [Objective] This study aims to investigate the effects of drought stress on the distribution of carbon (C), nitrogen (N), and phosphorus (P) elements and stoichiometry in organs of Pinus yunnanensis seedlings, and to provide a theoretical basis for water management in the cultivation of P . yunnanensis. [Methods] The contents of C, N, and P in organs of 1-year-old P . yunnanensis seedlings under drought stress were determined by potted water control method and four drought treatments. [Results] (1) Compared with the appropriate water treatment, the C content in leaves, stems, and fine roots of P . yunnanensis seedlings was decreased under drought stress, but was increased in coarse roots. N content was decreased in coarse roots and increased in fine roots. P content was increased in leaves and decreased in stems. (2) The variation coefficient of element content was P>N>C. The contents of C and N showed the greatest variability in fine roots. The variability of P content was the highest in leaves and the lowest in coarse roots. (3) There was a significant negative correlation between N content and coarse roots, a significant positive correlation between stems and fine roots, and a significant positive correlation between N and P contents in stems and coarse roots. [Conclusion] Under drought stress, growth of P . yunnanensis seedlings is restricted by N elements, and the utilization efficiency of N and P is increased. The overall variability of C, N, and P content in coarse and fine roots is higher than leaves and stems. The root system is more sensitive to changes in soil water status.

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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