
Comparison of growth and photosynthetic characteristics of introduced Acer rubrum on two purple soils
WEI Jing, TAN Xing, WANG Changsheng, YAN Rui, LI Linke, NING Yue, LIU Yun
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2024, Vol. 48 ›› Issue (1) : 97-105.
Comparison of growth and photosynthetic characteristics of introduced Acer rubrum on two purple soils
【Objective】 The growth and photosynthetic characteristics responses of Acer rubrum following introduction to two kinds of purple soil were studied, to provide reference data for the development and use of a suitable variety of A. rubrum in the Chongqing area of China. 【Method】 A. rubrum ‘Marmo’ and ‘Aurea’ introduced into neutral purple soil (NS1) and callitic purple soil (AS2) were analyzed. Growth, leaf color, and photosynthetic characteristics of A. rubrum were compared in the two kinds of purple soil in summer, when their growth was vigorous. 【Result】 The net plant height, crown width, leaf area of ‘Marmo’ were positively correlated with alkali-hydrolyzed nitrogen, available potassium, carbon/nitrogen ratio, and organic matter, and negatively correlated with soil pH. Compared with the initial introduction, the plant height of ‘Marmo’ in the neutral and calcareous zones increased by 3.44 m and 1.18 m, respectively, ground diameter increased by 5.14 cm and 2.22 cm, respectively, and the leaf area and specific leaf area were significantly different. However, there were no significant differences of ‘Aurea’ in net plant height, net ground diameter, or specific leaf area. The chlorophyll a (ChlT), chlorophyll b (Chlb), total chlorophyll (ChlT), carotenoid (Car), L*, a* and b* values, maximum photochemical efficiency (Fv/Fm), electron transfer efficiency (ETR), light energy capture efficiency Y(Ⅱ), photochemical quenching coefficients (qP), leaf maximum net photosynthetic rate, light saturation point (LSP), apparent quantum yield (AQY), leaf carboxylation rate, leaf carboxylation rate (α), and photorespiration rate (Rp) of ‘Marmo’ in neutral zone were significantly higher than that of in calcareous zone (P<0.05). Compared with purple soil alkaline zone, Pn,max and intercellular CO2 concentration of (Cs) ‘Aurea, in the neutral zone were significantly increased, LCP, CO2 compensation point (CCP) were significantly decreased (P<0.05). Chla, ChlT, Chl a/b, L*, a*, b* Fv/Fm, ETR, Y(Ⅱ), qP, LSP, AQY, CCP, Rd and Rp of ‘Aurea’ in the neutral zone were not significantly different from those in the calcareous zone (P>0.05). 【Conclusion】 Among the two types of purple soil, ‘Marmo’ increased the photosynthetic electron transfer rate and photosynthetic rate of photosystem Ⅱ and reduced the consumption of organic matter by increasing the light energy capture area. The photosynthetic capacity was enhanced and growth was strong in the neutral region, while the performance of ‘Marmo’ was poor in the calcareous zone, indicating that this variety is not suitable for alkaline purple soil. The photosynthetic characteristics and growth of ‘Aurea’ showed strong adaptability to the two types of purple soil.
introduction / Acer rubrum / growth adaptability / photosynthetic characteristics / chlorophyll fluorescence parameter / leaf color parameter
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