Photosynthetic characteristics of dioecious Populus davidiana, Fraxinus mandshurica and Taxus cuspidata

doi:10.12302/j.issn.1000-2006.202107023

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (1): 129-135.doi: 10.12302/j.issn.1000-2006.202107023

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Photosynthetic characteristics of dioecious Populus davidiana, Fraxinus mandshurica and Taxus cuspidata

SUN Xiaowei¹(), WANG Xingchang¹, SUN Huizhen¹^,^*(), QUAN Xiankui¹, YANG Qingjie²

1. Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
2. Engineering and Technology Research Center for Functional Prataculture, Northeast Forestry University, Harbin 150040, China

Received:2021-07-16 Accepted:2021-09-13 Online:2023-01-30 Published:2023-02-01
Contact: SUN Huizhen E-mail:livvys@qq.com;livvys@qq.com;sunhz-cf@nefu.edu.cn

Abstract

Abstract:

【Objective】 Exploring the photosynthetic characteristics of both sexes is valuable for additional assessment of environmental adaptation mechanisms and population formation in dioecious tree species.【Method】In the present study, the leaf photosynthetic gas exchange parameters of adult females and males of Populus davidiana, Fraxinus mandshurica and Taxus cuspidata were measured using a Li-6400XT portable photosynthesis system. 【Result】 Three female tree species consistently presented superior photosynthetic properties than the opposite sex even though significant differences were only observed at the light compensation point (P_LCP) and maximum carboxylation rate (C_E,max) of P. davidiana, water use efficiency (E_WUE) of F. mandshurica, and at the light saturation/compensation point (P_LSP/P_LCP), carboxylation efficiency (C_E), and light respiration rate (R_p) of T. cuspidata between genders. Leaf traits parameters for three female tree species exhibited a non-significant trend with higher values than those of males. 【Conclusion】 These results indicate that the three female tree species with higher photosynthetic capacity may exhibit compensatory mechanisms for simultaneously maintaining vegetative and reproductive growth to maximize lifetime fitness.

Key words: light response curve, CO₂ response curve, photosynthesis parameter, compensatory mechanism, dioecy

CLC Number:

S722

SUN Xiaowei, WANG Xingchang, SUN Huizhen, QUAN Xiankui, YANG Qingjie. Photosynthetic characteristics of dioecious Populus davidiana, Fraxinus mandshurica and Taxus cuspidata[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(1): 129-135.

Figures/Tables 3

Table 1

Fig.1

Table 2

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树种 species	性别 gender	单叶面积/ cm² LA	比叶重/ (g·m^-2) LMA	叶干物质含量 LDMC	叶片氮含量/ (g·m^-2) LNC
山杨 Pd	♀	17.12±1.32 b	68.75±1.36 b	0.42±0.01 a	1.73±0.06 b
	♂	15.52±1.15 b	72.76±2.57 b	0.44±0.01 a	1.71±0.05 b
水曲柳 Fm	♀	28.93±2.04 a	63.58±5.13 b	0.31±0.02 b	1.53±0.16 b
	♂	27.13±1.82 a	57.39±3.11 b	0.30±0.02 b	1.43±0.10 b
东北红豆杉 Tc	♀	0.39±0.03 c	129.73±11.70 a	0.30±0.01 b	2.93±0.31 a
	♂	0.33±0.03 c	111.81±11.36 a	0.31±0.01 b	2.43±0.29 a

树种 species	性别 gender	P_n / (μmol·m^-2·s^-1)	P_n,max / (μmol·m^-2·s^-1)	A_max / (μmol·m^-2·s^-1)	C_s / (mol·m^-2·s^-1)	T_r / (mmol·m^-2·s^-1)	E_WUE / (μmol·mmol^-1)	R_d / (μmol·m^-2·s^-1)
山杨 Pd	♀	10.96±1.22 b	10.49±1.25 b	29.49±1.07 a	0.18±0.03 b	1.90±0.33 b	6.03±0.59 a	1.60±0.05 a
	♂	9.33±0.26 b	9.68±0.38 b	26.30±1.51 a	0.15±0.02 b	1.88±0.11 b	5.01±0.27 ab	1.33±0.19 ab
水曲柳 Fm	♀	15.45±0.98 a	14.06±0.90 a	28.13±1.49 a	0.27±0.03 a	2.87±0.32 a	5.58±0.43 a	0.94±0.08 bc
	♂	14.92±1.26 a	14.76±1.26 a	26.57±2.63 a	0.29±0.03 a	3.43±0.38 a	4.43±0.18 bc	1.23±0.14 b
东北红豆杉Tc	♀	3.66±0.72 c	2.85±0.78 c	14.30±1.92 b	0.03±0.01 c	0.80±0.20 c	4.77±0.76 abc	0.40±0.06 d
	♂	2.92±0.55 c	3.25±0.40 c	9.90±1.01 b	0.03±0.01 c	0.70±0.07 c	4.14±0.67 c	0.77±0.17 cd
树种 species	性别 gender	P_LSP / (μmol·m^-2·s^-1)	P_LCP / (μmol·m^-2·s^-1)	η_AQY	C_E / (mol·m^-2·s^-1)	R_P / (μmol·m^-2·s^-1)	C_E,max / (μmol·m^-2·s^-1)	R_ET,max / (μmol·m^-2·s^-1)
山杨 Pd	♀	1 522.20±107.48 ab	31.06±1.36 a	0.035±0.002 a	0.056±0.007 b	4.11±0.42 b	47.68±4.58 b	135.89±12.56 a
	♂	1 399.41±134.54 b	23.48±2.58 b	0.036±0.002 a	0.049±0.002 bc	3.73±0.24 b	40.34±1.81 c	118.44±8.04 a
水曲柳 Fm	♀	1 955.52±292.68 a	17.45±1.55 b	0.040±0.002 a	0.084±0.006 a	7.08±0.51 a	62.32±4.14 a	125.77±6.67 a
	♂	1 876.74±104.91 a	23.83±2.38 ab	0.038±0.002 a	0.080±0.008 a	7.00±0.61 a	56.22±4.16 a	114.24±10.86 a
东北红豆杉Tc	♀	1 017.85±12.12 c	19.27±4.38 b	0.014±0.004 b	0.032±0.004 c	2.81±0.21 b	21.49±2.81 d	60.18±7.30 b
	♂	1 341.43±57.18 b	33.08±10.43 a	0.015±0.001 b	0.020±0.002 d	1.76±0.14 c	14.39±1.68 d	40.97±4.01 b

Photosynthetic characteristics of dioecious Populus davidiana, Fraxinus mandshurica and Taxus cuspidata

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