Journal of Guangxi Normal University(Natural Science Edition) ›› 2026, Vol. 44 ›› Issue (4): 246-256.doi: 10.16088/j.issn.1001-6600.2025083103

• Agricultural Science • Previous Articles    

Physiological responses and cold tolerance evaluation of Acacia mangium × A. auriculiformis seedlings

Xu Zuyuan1,2 , Chen Li3, Yang Baoting1,2, Feng Yizhuo1,2, Cao Guangqiu1,2, Cao Shijiang1,2*   

  1. 1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou Fujian 350002, China;
    2. Fujian Provincial Key Laboratory of Physiology, Ecology and Molecular Biology of Forest Stress (Fujian Agriculture and Forestry University), Fuzhou Fujian 350002, China;
    3. Guangxi State-owned Gaofeng Forest Farm, Nanning Guangxi 530001, China
  • Received:2025-08-31 Revised:2025-10-28 Online:2026-07-05 Published:2026-07-01

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Abstract: This study aimed toprobe into the physiological responses of one-year-old seedlings of Acacia mangium, Acacia auriculiformis, and their hybrid clones (No. 8, No. 9, and No. 19) under low-temperature stress. A randomized block design was adopted, with five temperature treatments (25 ℃ as the control, 15, 10, 5, and 0 ℃); samples were taken and physiological indiceswere measured every 3 days. The results showed that under low-temperature stress the chlorophyll content of all Acacia materials declined significantly, and the longer the stress lasted, the lower the chlorophyll level became; malondialdehyde content rose overall, whereas peroxidase and catalase activities first increased and then decreased, and soluble-protein content likewise followed a trend of initial increase followed by decline. Comprehensive evaluation revealed that clone No. 8 of the Acacia mangium × A. auriculiformis hybrid possesses strong low-temperature adaptability, whereas clone No. 19 is markedly sensitive to low-temperature stress. This study provides a scientific basis for elucidating the low-temperature adaptation mechanisms of Acacia mangium × A. auriculiformis and is of great significance for breeding cold-tolerant varieties and optimizing cultivation management practices.

Key words: Acacia mangium×Acacia auriculiformis, low-temperature stress, physiological response, cold-resistance evaluation

CLC Number:  S722.36
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