Comparison of Chlorophyll Fluorescence Characteristics Between Torreya jiulongshanensis Leaves and its Widespread Congener T.Grandis

doi:10.13466/j.cnki.lyzygl.2021.01.012

Abstract

Abstract:

In order to provide scientific basis for the conservation of Torreya jiulongshanensis germplasm resources,response of chlorophyll fluorescence parameters of T.jiulongshanensis(male and female) and its widespread congener T.grandis leaves(under cultivation and field conditions,respectively) to light intensity are compared in this paper.The results show that,under cultivation conditions,the maximum fluorescence value of photosystem I of female seedlings of T.jiulongshanensis is higher than that of male seedlings and T.grandis.The light saturation points of female and male seedlings of T.jiulongshanensis are 788.581 and 550.640 μmol/(m²·s),respectively,and the corresponding maximum electron transfer rates are 40.690 and 39.546 μmol/(m²·s),respectively.Similarly,under field conditions,the light saturation points of female and male plants of T.jiulongshanensis are significantly higher than those of T.grandis,which stand at 1 165.361 and 1 416.817 μmol/(m²·s),respectively.The maximum electron transfer rate of photosystem II of female plants of T.jiulongshanensis is the highest,which is 80.322 μmol/(m²·s).Therefore,T.jiulongshanensis is a sunny tree species and has stronger photosynthetic potential than T.grandis.

Key words: Torreya jiulongshanensis, T.grandis, cultivation conditions, field conditions, chlorophyll fluorescence parameters, light intensity

CLC Number:

Q9453.79

ZHENG Yingmao, ZHOU Yuhong, PAN Chengchun, LIU Julian, LAN Benkuan, KANG Huajing. Comparison of Chlorophyll Fluorescence Characteristics Between Torreya jiulongshanensis Leaves and its Widespread Congener T.Grandis[J]. FOREST RESOURCES WANAGEMENT, 2021, (1): 86-93.

Figures/Tables 8

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植物	模型	初始斜率/ (μmol/mol)	最大电子传递速率/ μmol/(m²·s)	饱和光强/ μmol/(m²·s)	确定系数(R²)
榧树	测量值	—	34.286±5.658 b	?500 a	—
	拟合值 model I	0.445±0.045	35.339±5.897 b	454.130±25.859 a	0.980±0.006
	model II	0.551±0.057	40.186±7.011 a	242.554±7.319 b	0.954±0.013
	model III	0.287±0.023	34.080±5.233 b	172.810±5.609 c	0.998±0.001
	modelIV	0.415±0.049	35.334±5.377 b	188.265±10.284 c	0.988±0.006
九龙山榧-雄	测量值	—	39.800±3.408 b	?759 a	—
	拟合值 model I	0.447±0.013	39.546±3.315 b	550.640±50.913 b	0.986±0.002
	model II	0.526±0.022	46.033±4.252 a	258.474±8.515 c	0.975±0.006
	model III	0.345±0.081	40.342±3.817 b	203.618±24.380 d	0.995±0.08
	model IV	0.401±0.017	38.791±3.342 b	198.067±6.805 d	0.993±0.001
九龙山榧-雌	测量值	—	41.243±3.160 b	?759 a	—
	拟合值 model I	0.416±0.021	40.690±3.038 b	788.581±92.911a	0.995±0.002
	model II	0.453±0.030	47.366±3.988 a	276.608±7.646 b	0.993±0.003
	model III	0.345±0.015	43.357±3.048 b	238.162±11.668 c	0.998±0.001
	model IV	0.344±0.024	39.479±3.318 b	214.681±6.080c	0.995±0.001

植物	初始斜率/(μmol/mol)	最大电子传递速率/(μmol/(m²·s))	饱和光强/(μmol/(m²·s))	确定系数(R²)
榧树	0.448±0.020a	64.743± 1.337b	914.207±116.195c	0.877±0.033
九龙山榧-雄	0.459±0.082a	66.308±16.309b	1416.817± 34.586a	0.878±0.046
九龙山榧-雌	0.439±0.014a	80.322± 4.407a	1165.361±141.734b	0.909±0.065