Clonal variation in growth,PSⅡ photochemical activity and polar metabolites in Pinus elliottii × P.c

• 作 者: Wenbing Guo Fencheng Zhao Yang Liu Zhen Li Huishan Wu Yiliang Li Fangyan Liao
• 机 构: Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of
• 出 处: 林业研究（英文版）
• 发表日期: 2022年1期
• 关键词: Carbohydrates Chlorophyll fluorescence parameters Metabolic profiling Phosphorus

Pinus elliottii × P.caribaea is a widely planted commercial tree hybrid in South China.To investigate the potential of physiological parameters for clonal selection,cuttings of three clones (EH3,EH4 and EH5) and a control were grown in phosphorus treated pots.Significant vari-ations to phosphorous,photosystem Ⅱ activity and polar metabolite abundance in needles were noted among clones.Clone EH5 was the most P-responsive and had maximum height growth.The highest maximum quantum yield of PSⅡin the dark (Fv/Fm),maximum quantum yield of PSⅡ in the light (Fv\'/Fm\') and the actual PSⅡ efficiency (φPSⅡ) values were also found in EH5.A total of 64 polar metabolites were identified,21 were regulated by phosphorous,while 28 accumulated differentially among the three clones.There were few overlapping responsive metabolites to phosphorous fertilization.In EH5,the abundance of maltotriitol,neohes-peridin and raffinose were highest,whereas galactinol and shikimic acid were lower compared with EH3 and EH4.The results reveal that physiological traits were genetically con-trolled and might be useful for selecting clones with high phosphorous utilization efficiency.