Quantification and verification of temperature effect on the duality of alleochemical role in boreal forest regeneration

Autor: Min-fen Yu, Qiang Wang, Cun-De Pan, Zhao-Hui Li, Li Yang, Xiao Ruan, de-an jiang, Yingxian Zhao
Rok vydání: 2021
Předmět:
Zdroj: Environmental and Experimental Botany. 187:104481
ISSN: 0098-8472
DOI: 10.1016/j.envexpbot.2021.104481
Popis: By designing and conducting a series of temperature-controllable experiments in greenhouse, this work emphatically investigated how the positive or negative allelochemical effects of a key metabolic compound 3,4-dihydroxyacetophenone (DHAP) from the needles of Picea schrenkiana would vary with environmental temperature. It was found that the alleochemical effect of DHAP on the germination, seedling growth, root development, endogenous plant hormone content and antioxidant enzyme activity of P. schrenkiana demonstrated an orientation duality identified by the existence of a compensation concentration at a certain temperature, which set up a boundary between promotional and inhibitory effect. As temperature increased from 10/2 °C up to 12/4, 14/6, 16/8, and 18/10 °C in turn, the compensation point of DHAP concentration would correspondingly shift from 0.32mM down to 0.28, 0.24, 0.21 and 0.19mM, respectively. Overall, this work will deepen and enrich the understandings to the uncertainty of allelochemical effects on P. schrenkiana regeneration due to climate warming, and provide some helpful suggestions to develop a scientific management strategy for boreal forest.
Databáze: OpenAIRE
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