Analysis of Photosynthetic Characteristics of Six Kiwifruit Varieties

doi:10.11924/j.issn.1000-6850.casb2023-0125

Abstract

Abstract:

In order to provide a reference basis for screening excellent kiwifruit varieties, two local main varieties and four introduced varieties in Tai’an city were used as experimental materials to measure the physiological indexes related to leaves. The diurnal variation of photosynthesis and photosynthetic light response (Pn-PAR) of six kiwifruit varieties were measured using portable photosynthesis measurement system, and the correlation between net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO₂ concentration (Ci) and transpiration rate (Tr) was analyzed. The results showed that ‘Xuxiang’ had the highest light adaptation range, its apparent photosynthetic quantum yield was 0.067, and the light saturation point was 1632 μmol/(m²·s), the difference between light saturation point and light compensation point was 1600 μmol/(m²·s). The maximum net photosynthetic rate of ‘Taishan No.1’ was 18.45 μmol/(m²·s), the highest light use efficiency was 1.26%, which was the highest among the six kiwifruit varieties. According to comprehensive analysis, ‘Xuxiang’ and ‘Taishan No.1’ had the best photosynthetic characteristics. Correlation analysis was conducted with net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO₂ concentration as variables. It was found that stomatal conductance and transpiration rate had a significant positive correlation with net photosynthetic rate of kiwifruit, while intercellular CO₂ concentration and net photosynthetic rate had a significant negative correlation.

Key words: kiwifruit, photosynthetic characteristics, Pn-PAR response, diurnal variation of photosynthesis, correlation, light use efficiency

DONG Lijuan, SUN Yangyang, ZHANG Jiliang, ZHANG Chunxiang. Analysis of Photosynthetic Characteristics of Six Kiwifruit Varieties[J]. Chinese Agricultural Science Bulletin, 2024, 40(4): 61-66.

Figures/Tables 6

References 26

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品种	叶柄长度/cm	叶片长度/cm	叶片宽度/cm	叶片鲜重/g	叶片干重/g	相对含水量/%	SPAD
泰山1号	8.93±0.45bc	10.60±0.24b	13.91±0.24c	5.29±0.61b	2.73±0.24a	47.86±2.02c	50.98±1.63a
红阳	6.86±0.32d	10.72±0.18b	15.13±0.29b	5.01±0.35b	2.00±0.06b	59.70±1.87b	47.09±0.62bcd
徐香	7.86±0.53cd	13.62±0.34a	17.40±0.34a	7.53±0.12a	2.63±0.11a	65.00±1.52a	50.68±0.64ab
金艳	10.23±0.39ab	11.36±0.27b	15.10±0.39b	5.00±0.22b	2.03±0.04b	59.34±1.06b	45.61±1.20cd
大河峪优系	9.28±0.66abc	13.75±0.58a	13.56±0.31c	5.68±0.43b	2.14±0.20b	62.34±1.98ab	48.00±1.68abc
黄金果	10.49±0.58a	12.99±0.37a	13.49±0.27c	5.04±0.23b	2.12±0.06b	57.93±2.07b	43.84±1.32d

品种	叶柄长度/cm	叶片长度/cm	叶片宽度/cm	叶片鲜重/g	叶片干重/g	相对含水量/%	SPAD
泰山1号	8.93±0.45bc	10.60±0.24b	13.91±0.24c	5.29±0.61b	2.73±0.24a	47.86±2.02c	50.98±1.63a
红阳	6.86±0.32d	10.72±0.18b	15.13±0.29b	5.01±0.35b	2.00±0.06b	59.70±1.87b	47.09±0.62bcd
徐香	7.86±0.53cd	13.62±0.34a	17.40±0.34a	7.53±0.12a	2.63±0.11a	65.00±1.52a	50.68±0.64ab
金艳	10.23±0.39ab	11.36±0.27b	15.10±0.39b	5.00±0.22b	2.03±0.04b	59.34±1.06b	45.61±1.20cd
大河峪优系	9.28±0.66abc	13.75±0.58a	13.56±0.31c	5.68±0.43b	2.14±0.20b	62.34±1.98ab	48.00±1.68abc
黄金果	10.49±0.58a	12.99±0.37a	13.49±0.27c	5.04±0.23b	2.12±0.06b	57.93±2.07b	43.84±1.32d

品种	表观量子效率	光饱和速率/ [μmol/(m²·s)]	光饱和点/ [μmol/(m²·s)]	光补偿点/ [μmol/(m²·s)]	光饱和点与光补偿点差值/ [μmol/(m²·s)]	暗呼吸速率/ [μmol/(m²·s)]
泰山1号	0.049	19.14	1216	28	1188	1.36
徐香	0.067	17.47	1632	32	1600	2.11
红阳	0.057	14.18	1020	32	988	1.76
金艳	0.045	5.92	520	36	484	1.54
黄金果	0.049	14.00	944	36	908	1.69
大河峪优系	0.027	11.63	1072	20	1052	0.54

品种	表观量子效率	光饱和速率/ [μmol/(m²·s)]	光饱和点/ [μmol/(m²·s)]	光补偿点/ [μmol/(m²·s)]	光饱和点与光补偿点差值/ [μmol/(m²·s)]	暗呼吸速率/ [μmol/(m²·s)]
泰山1号	0.049	19.14	1216	28	1188	1.36
徐香	0.067	17.47	1632	32	1600	2.11
红阳	0.057	14.18	1020	32	988	1.76
金艳	0.045	5.92	520	36	484	1.54
黄金果	0.049	14.00	944	36	908	1.69
大河峪优系	0.027	11.63	1072	20	1052	0.54

	净光合速率	气孔导度	蒸腾速率	胞间CO₂浓度
净光合速率	1
气孔导度	0.819^**	1
蒸腾速率	0.823^**	0.771^**	1
胞间CO₂浓度	-0.367^*	-0.022	-0.167	1