黑沙蒿光合能量分配组分在生长季的相对变化与调控机制

doi:10.17521/cjpe.2021.0146

植物生态学报 ›› 2021, Vol. 45 ›› Issue (8): 870-879.DOI: 10.17521/cjpe.2021.0146

所属专题：光合作用

黑沙蒿光合能量分配组分在生长季的相对变化与调控机制

靳川¹^,², 李鑫豪¹^,², 蒋燕¹^,², 徐铭泽¹^,², 田赟¹^,², 刘鹏¹^,², 贾昕¹^,²^,³, 查天山¹^,²^,³^,^*()

¹北京林业大学水土保持学院, 北京 100083
²宁夏盐池毛乌素沙地生态系统国家定位观测研究站, 北京 100083
³北京林业大学水土保持国家林业局重点实验室, 北京 100083

收稿日期:2021-04-19 修回日期:2021-06-26 出版日期:2021-08-20 发布日期:2021-07-22
通讯作者: 查天山
作者简介:* tianshanzha@bjfu.edu.cn
基金资助:
国家自然科学基金(32071842);国家自然科学基金(31901366);国家自然科学基金(32071843);中央高校基本科研业务费专项资金(2015ZCQ-SB-02)

Relative changes and regulation of photosynthetic energy partitioning components in Artemisia ordosica during growing season

JIN Chuan¹^,², LI Xin-Hao¹^,², JIANG Yan¹^,², XU Ming-Ze¹^,², TIAN Yun¹^,², LIU Peng¹^,², JIA Xin¹^,²^,³, ZHA Tian- Shan¹^,²^,³^,^*()

¹School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
²Yanchi Ecology Research Station of Mau US Desert, Beijing 100083, China
³Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China

Received:2021-04-19 Revised:2021-06-26 Online:2021-08-20 Published:2021-07-22
Contact: ZHA Tian- Shan
Supported by:
National Natural Science Foundation of China(32071842);National Natural Science Foundation of China(31901366);National Natural Science Foundation of China(32071843);Fundamental Research Funds for the Central Universities(2015ZCQ-SB-02)

摘要/Abstract

摘要：

为了探明典型荒漠灌木优势物种黑沙蒿(俗名油蒿, Artemisia ordosica)光合过程能量中分配对环境波动的相对变化及其长期调节机制, 该研究于2018年4-10月在宁夏盐池毛乌素沙地, 同时使用MONITORING-PAM多通道荧光监测仪和LI-6400XT便携式光合测量仪对黑沙蒿叶片的最小荧光产量(F_o)、最大荧光产量(F_m)、稳态荧光产量(F_s)、光下最大荧光产量(F_m′)、净光合速率(P_n)、暗呼吸速率(R_d)、蒸腾速率(E)和叶片气孔导度(g_s)进行现场测定, 在实验室内计算比叶面积(SLA)、单位面积氮含量(N_area)、叶绿素含量(C_Chl)和叶绿素a/b (Chl a/b), 分析黑沙蒿光合过程能量分配中固碳耗能占比(Φ_A)、光呼吸耗能占比(Φ_PR)、调节性热耗散耗能占比(Φ_NPQ)和非调节性热耗散耗能占比(Φ_NO)与环境参数和叶性状参数之间的关系以及能量分配各组分之间的相对变化。结果表明, 光化学反应组分(Φ_A、Φ_PR)和热耗散组分(Φ_NPQ、Φ_NO)之间呈负相关竞争关系, 两组分内部呈正相关协同关系, E和Φ_A、Φ_PR正相关, 和Φ_NPQ、Φ_NO负相关。在低土壤含水量(SWC)和高饱和水汽压差(VPD)环境条件下, 黑沙蒿Φ_A、Φ_PR和SLA显著降低, Φ_NPQ和Φ_NO显著增加。研究认为, 在长期干旱或高蒸散条件下, 黑沙蒿通过降低SLA等途径避免水分的过度流失, 同时将部分过剩光能由光呼吸代谢途径转移到热耗散组分进行耗散。波动环境下黑沙蒿形态性状的变异和光合过程能量分配的长期调节机制, 反映了其利用形态与生理的协同可塑性对逆境的适应。

关键词: 荒漠植物, 光合作用, 能量分配, 光呼吸, 热耗散

Abstract:

Aims This study is to examine the relative changes and regulation in photosynthetic energy partitioning components of a typical desert shrub Artemisia ordosica in Northwest China.
Methods The minimum fluorescence yield (F_o), maximal fluorescence yield (F_m), actual ﬂuorescence yield (F_s), maximal fluorescence yield in the light-adapted state (F_m′), net photosynthetic rate (P_n), dark respiration (R_d), transpiration rate (E) and stomatal conductance (g_s) of A. ordosica were investigated from April to October, 2018 using a multi-channel fluorometer and a portable photosynthesis analyzer. The specific leaf area (SLA), nitrogen per leaf area (N_area), chlorophyll content (C_Chl) and the ratio of chlorophyll a to chlorophyll b content (Chl a/b) were also measured. We analyzed the fraction of energy used for CO₂ assimilation (Φ_A), the fraction of energy used for photorespiration (Φ_PR), the fraction of regulate heat dissipation (Φ_NPQ) and the fraction of non-regulate heat dissipation in energy allocation (Φ_NO) during the photosynthetic process in A. ordosica and their responses to fluctuating environment.
Important findings The photochemical reaction component (Φ_A and Φ_PR) and the heat dissipation component (Φ_NPQ and Φ_NO) showed a negative competition relationship, and exhibited positive synergistic relationship within components. E was positively correlated with Φ_A and Φ_PR, and negatively correlated with Φ_NPQ and Φ_NO. Under low soil water content (SWC) and high saturated water vapor pressure (VPD) conditions, Φ_A, Φ_PR and SLA were significantly decreased, while Φ_NPQ and Φ_NO were significantly increased. The results indicate that A. ordosica avoids excessive loss of water under the condition of the long drought or high evapotranspiration via reducing SLA. Synergistically, excessive light energy is transferred from photorespiration to thermal dissipation pathway. The relative changes and long-term regulation of photosynthetic energy partitioning in A. ordosica under fluctuating environment, fully reflect the acclimation of plants to adversity via its synergistic morphologic and physiological plasticity.

Key words: desert plant, photosynthesis, energy partitioning, photorespiration, heat dissipation

靳川, 李鑫豪, 蒋燕, 徐铭泽, 田赟, 刘鹏, 贾昕, 查天山. 黑沙蒿光合能量分配组分在生长季的相对变化与调控机制. 植物生态学报, 2021, 45(8): 870-879. DOI: 10.17521/cjpe.2021.0146

JIN Chuan, LI Xin-Hao, JIANG Yan, XU Ming-Ze, TIAN Yun, LIU Peng, JIA Xin, ZHA Tian- Shan. Relative changes and regulation of photosynthetic energy partitioning components in Artemisia ordosica during growing season. Chinese Journal of Plant Ecology, 2021, 45(8): 870-879. DOI: 10.17521/cjpe.2021.0146

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2021.0146

https://www.plant-ecology.com/CN/Y2021/V45/I8/870

图/表 5

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	Φ_A	Φ_PR	Φ_NPQ	Φ_NO	PAR	T_a	VPD	SWC	F_v/F_m	E	g_s	N_area	SLA	C_Chl	Chl a/b
Φ_A	1.000 0
Φ_PR	0.995 0^**	1.000 0
Φ_NPQ	-0.921 6^**	-0.916 6^**	1.000 0
Φ_NO	-0.960 8^**	-0.966 7^**	0.785 9^**	1.000 0
PAR	-0.194 7	-0.214 2	0.170 1	0.214 8	1.000 0
T_a	-0.231 2	-0.224 3	0.199 6	0.225 0	0.540 2^**	1.000 0
VPD	-0.114 8	-0.053 7	0.110 6	0.043 6	0.706 3^*	0.341 5	1.000 0
SWC	0.361 7	0.426 4	-0.347 9	-0.407 8	-0.506 8	-0.097 9	-0.526 0	1.000 0
F_v/F_m	0.058 9	0.099 8	-0.006 6	-0.131 3	-0.038 3	0.030 1	-0.252 6	0.251 5	1.000 0
E	0.619 5^**	0.634 5^**	-0.521 1^*	-0.647 0^**	0.185 0	0.339 0	0.184 4	0.176 1	-0.339 2	1.000 0
g_s	0.225 7	0.271 4	-0.225 4	-0.254 6	-0.205 3	-0.419 4	-0.206 4	0.221 9	0.414 5^*	0.130 5	1.000 0
N_area	0.105 1	0.014 8	-0.109 4	0.001 5	0.132 2	-0.271 7	0.583 3^*	-0.646 3^*	-0.294 9	-0.144 6	-0.035 5	1.000 0
SLA	-0.192 1	-0.127 2	0.057 8	0.195 9	-0.306 8	-0.055 1	-0.586 3^*	0.569 2^*	0.438 9	-0.101 8	0.389 7	-0.530 6	1.000 0
C_Chl	-0.266 9	-0.242 1	0.254 8	0.226 0	0.612 1^*	0.423 2	0.345 0	-0.133 7	0.445 8	0.164 9	0.290 9	-0.120 4	-0.041 4	1.000 0
Chl a/b	-0.030 8	-0.066 9	0.168 9	-0.024 8	0.171 5	-0.106 6	0.197 2	-0.144 8	-0.112 6	0.034 8	0.065 3	0.444 5	-0.004 7	0.251 4	1.000 0

	Φ_A	Φ_PR	Φ_NPQ	Φ_NO	PAR	T_a	VPD	SWC	F_v/F_m	E	g_s	N_area	SLA	C_Chl	Chl a/b
Φ_A	1.000 0
Φ_PR	0.995 0^**	1.000 0
Φ_NPQ	-0.921 6^**	-0.916 6^**	1.000 0
Φ_NO	-0.960 8^**	-0.966 7^**	0.785 9^**	1.000 0
PAR	-0.194 7	-0.214 2	0.170 1	0.214 8	1.000 0
T_a	-0.231 2	-0.224 3	0.199 6	0.225 0	0.540 2^**	1.000 0
VPD	-0.114 8	-0.053 7	0.110 6	0.043 6	0.706 3^*	0.341 5	1.000 0
SWC	0.361 7	0.426 4	-0.347 9	-0.407 8	-0.506 8	-0.097 9	-0.526 0	1.000 0
F_v/F_m	0.058 9	0.099 8	-0.006 6	-0.131 3	-0.038 3	0.030 1	-0.252 6	0.251 5	1.000 0
E	0.619 5^**	0.634 5^**	-0.521 1^*	-0.647 0^**	0.185 0	0.339 0	0.184 4	0.176 1	-0.339 2	1.000 0
g_s	0.225 7	0.271 4	-0.225 4	-0.254 6	-0.205 3	-0.419 4	-0.206 4	0.221 9	0.414 5^*	0.130 5	1.000 0
N_area	0.105 1	0.014 8	-0.109 4	0.001 5	0.132 2	-0.271 7	0.583 3^*	-0.646 3^*	-0.294 9	-0.144 6	-0.035 5	1.000 0
SLA	-0.192 1	-0.127 2	0.057 8	0.195 9	-0.306 8	-0.055 1	-0.586 3^*	0.569 2^*	0.438 9	-0.101 8	0.389 7	-0.530 6	1.000 0
C_Chl	-0.266 9	-0.242 1	0.254 8	0.226 0	0.612 1^*	0.423 2	0.345 0	-0.133 7	0.445 8	0.164 9	0.290 9	-0.120 4	-0.041 4	1.000 0
Chl a/b	-0.030 8	-0.066 9	0.168 9	-0.024 8	0.171 5	-0.106 6	0.197 2	-0.144 8	-0.112 6	0.034 8	0.065 3	0.444 5	-0.004 7	0.251 4	1.000 0

	E	g_s	N_area	SLA	C_Chl	Chl a/b	Y	SSE	R²	p	AIC
Φ_A	0.000 8 (0.001 2)	0.018 9 (0.051 5)	0.069 1 (0.033 8)	0.001 9 (0.000 7)	0.0347 (0.056 1)	0.004 2 (0.010 1)	0.075 3 (0.168 3)	0.000 3	0.57	0.29	-50.72
Φ_PR	0.001 5 (0.336 7)	0.050 5 (0.103 0)	0.001 1 (0.067 6)	0.000 3 (0.001 3)	0.069 3 (0.112 2)	0.008 5 (0.020 8)	0.150 7 (0.336 7)	0.001 3	0.58	0.26	-42.29
Φ_NPQ	-0.000 9 (0.001 8)	-0.014 9 (0.078 8)	-0.049 3 (0.051 7)	-0.001 1 (0.001 0)	-0.007 4 (0.085 9)	-0.007 3 (0.015 9)	0.572 9 (0.257 6)	0.000 8	0.59	0.25	-45.54
Φ_NO	-0.001 4 (0.002 1)	-0.084 4 (0.093 7)	-0.041 2 (0.061 5)	-0.000 5 (0.001 2)	-0.111 5 (0.102 1)	-0.020 1 (0.018 9)	0.200 9 (0.306 3)	0.001 1	0.69	0.11	-43.44

	E	g_s	N_area	SLA	C_Chl	Chl a/b	Y	SSE	R²	p	AIC
Φ_A	0.000 8 (0.001 2)	0.018 9 (0.051 5)	0.069 1 (0.033 8)	0.001 9 (0.000 7)	0.0347 (0.056 1)	0.004 2 (0.010 1)	0.075 3 (0.168 3)	0.000 3	0.57	0.29	-50.72
Φ_PR	0.001 5 (0.336 7)	0.050 5 (0.103 0)	0.001 1 (0.067 6)	0.000 3 (0.001 3)	0.069 3 (0.112 2)	0.008 5 (0.020 8)	0.150 7 (0.336 7)	0.001 3	0.58	0.26	-42.29
Φ_NPQ	-0.000 9 (0.001 8)	-0.014 9 (0.078 8)	-0.049 3 (0.051 7)	-0.001 1 (0.001 0)	-0.007 4 (0.085 9)	-0.007 3 (0.015 9)	0.572 9 (0.257 6)	0.000 8	0.59	0.25	-45.54
Φ_NO	-0.001 4 (0.002 1)	-0.084 4 (0.093 7)	-0.041 2 (0.061 5)	-0.000 5 (0.001 2)	-0.111 5 (0.102 1)	-0.020 1 (0.018 9)	0.200 9 (0.306 3)	0.001 1	0.69	0.11	-43.44

黑沙蒿光合能量分配组分在生长季的相对变化与调控机制

Relative changes and regulation of photosynthetic energy partitioning components in Artemisia ordosica during growing season

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