Comparative Study on Physiological Characteristics of Three Sophora japonica ‘Jinhuai’ Varieties

doi:10.11924/j.issn.1000-6850.casb2020-0230

Abstract

Abstract:

To explore the resistance ability of different varieties of Sophora japonica ‘Jinhuai’, and provide a theoretical basis for the variety selection and cultivation physiology research, taking three S. japonica ‘Jinhuai’ (‘Jinhuai J1’, ‘Jinguai J2’and ‘Jinhuai J3’) as the research objects, we investigated the photosynthetic indexes, MDA and PRO content, activities of SOD, POD and CAT in the leaves. The results showed that the variation trend of light response curves of the three S. japonica ‘Jinhuai’ varieties were basically the same, but after 800 μmol/(m2·s) of photosynthetic active radiation (PAR), the net photosynthetic rate of ‘Jinhuai J2’ was significantly higher than that of ‘Jinhuai J1’ and ‘Jinhuai J3’. The light saturation point, net photosynthetic rate, stomatal conductance, intercellular CO₂ concentration, transpiration efficiency, proline content, catalase activity, superoxide dismutase activity and peroxidase of the three varieties showed the same regularity, and the order from high to low was ‘Jinhuai J2’, ‘Jinhuai J1’, ‘Jinhuai J3’. The order of MDA content from high to low was ‘Jinhuai J3’, ‘Jinhuai J1’, Jinhuai J2. Considering that ‘Jinhuai J2’ has strong adaptability to water shortage and drought condition, and has strong stress resistance, it can be the first choice for planting.

Key words: Sophora japonica ‘Jinhuai’, net photosynthetic rat, light response curve, photosynthesis, antioxidant enzyme

CLC Number:

S529

Qin Fang, Shi Yancai, Qin Huizhen, Zou Rong, Jiang Yunsheng, Xiong Zhongchen. Comparative Study on Physiological Characteristics of Three Sophora japonica ‘Jinhuai’ Varieties[J]. Chinese Agricultural Science Bulletin, 2021, 37(18): 38-43.

Figures/Tables 11

References 25

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参数	最大光合速率/[μmol/(m²·s)]	光饱和点/[μmol/(m²·s)]	光补偿点/[μmol/(m²·s)]	表观量子效率/(mmol/mol)	暗呼吸速率/[μmol/(m²·s)]
金槐J1	18.09±0.28a	1845.33±212.71a	34.91±3.59a	0.08±0.01a	2.77±0.06b
金槐J2	20.84±1.07b	1863.76±168.59a	40.66±10.09b	0.06±0.00a	2.02±0.64a
金槐J3	16.17±0.37a	1721.87±172.81b	45.38±8.31b	0.07±0.00a	2.79±0.46b

参数	最大光合速率/[μmol/(m²·s)]	光饱和点/[μmol/(m²·s)]	光补偿点/[μmol/(m²·s)]	表观量子效率/(mmol/mol)	暗呼吸速率/[μmol/(m²·s)]
金槐J1	18.09±0.28a	1845.33±212.71a	34.91±3.59a	0.08±0.01a	2.77±0.06b
金槐J2	20.84±1.07b	1863.76±168.59a	40.66±10.09b	0.06±0.00a	2.02±0.64a
金槐J3	16.17±0.37a	1721.87±172.81b	45.38±8.31b	0.07±0.00a	2.79±0.46b