Effects of potassium deficiency on photosynthesis and photoprotection mechanisms in soybean (Glycine max (L.) Merr.)

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	Effects of potassium deficiency on photosynthesis and photoprotection mechanisms in soybean (Glycine max (L.) Merr.)
其他题名	Effects of potassium deficiency on photosynthesis and photoprotection mechanisms in soybean (Glycine max (L.) Merr.)
	Wang Xiaoguang 1; Zhao Xinhua 1; Jiang Chunji 1; Li Chunhong 1; Cong Shan 1; Wu Di 1; Chen Yanqiu 1; Yu Haiqiu 1; Wang Chunyan 2
	2015
发表期刊	JOURNAL OF INTEGRATIVE AGRICULTURE
ISSN	2095-3119
卷号	14 期号:5 页码:856-863
摘要	Potassium is an important nutrient element requiring high concentration for photosynthetic metabolism. The potassium deficiency in soil could inhibit soybean (Glycine max (L.) Merr.) photosynthesis and result in yield reduction. Research on the photosynthetic variations of the different tolerant soyben varieties should provide important information for high yield tolerant soybean breeding program. Two representative soybean varieties Tiefeng 40 (tolerance to K+ deficiency) and GD8521 (sensitive to K+ deficiency) were hydroponically grown to measure the photosynthesis, chlorophyll fluorescence parameters and Rubisco activity under different potassium conditions. With the K-deficiency stress time extending, the net photosynthetic rate (P-n), transpiration rate (T-r) and stomatal conductance (G(s)) of GD8521 were significantly decreased under K-deficiency condition, whereas the intercellular CO2 concentration (C-i) was significantly increased. As a contrast, the variations of Tiefeng 40 were almost little under K-deficiency condition, which indicated tolerance to K+ deficiency variety could maintain higher efficient photosynthesis. On the 25th d after treatment, the minimal fluorescence (F-0) of GD8521 was significantly increased and the maximal fluorescence (F-m), the maximum quantum efficiency of PSII photochemistry (F root F-m), actual photochemical efficiency of PSII (phi(PSII)), photochemical quenching (q(P)), and electron transport rate of PSII (ETR) were significantly decreased under K+ deficiency condition. In addition, the Rubisco content of GD8521 was significantly decreased in leaves. It is particularly noteworthy that the chlorophyll fluorescence parameters and Rubisco content of Tiefeng 40 were unaffected under K+ deficiency condition. On the other hand, the non-photochemical quenching (q(N)) of Tiefeng 40 was significantly increased. The dry matter weight of Tiefeng 40 was little affected under K+ deficiency condition. Results indicated that Tiefeng 40 could avoid or relieve the destruction of PSII caused by exceeded absorbed solar energy under K-deficiency condition and maintain natural photosynthesis and plant growth. It was an essential physiological mechanism for low-K-tolerant soybean under K-deficiency stress.
其他摘要	Potassium is an important nutrient element requiring high concentration for photosynthetic metabolism. The potassium deficiency in soil could inhibit soybean (Glycine max (L.) Merr.) photosynthesis and result in yield reduction. Research on the photosynthetic variations of the different tolerant soyben varieties should provide important information for high yield tolerant soybean breeding program. Two representative soybean varieties Tiefeng 40 (tolerance to K~+ deficiency) and GD8521 (sensitive to K~+ deficiency) were hydroponically grown to measure the photosynthesis, chlorophyll fluorescence parameters and Rubisco activity under different potassium conditions. With the K-deficiency stress time extending, the net photosynthetic rate (P_n), transpiration rate (Tr) and stomatal conductance (G_s) of GD8521 were significantly decreased under K-deficiency condition, whereas the intercellular CO_2 concentration (C_i) was significantly increased. As a contrast, the variations of Tiefeng 40 were almost little under K-deficiency condition, which indicated tolerance to K~+ deficiency variety could maintain higher efficient photosynthesis. On the 25th d after treatment, the minimal fluorescence (F_0) of GD8521 was significantly increased and the maximal fluorescence (F_m), the maximum quantum efficiency of PSII photochemistry (F_v/ F_m), actual photochemical efficiency of PSII (Φ_(Psll)),photochemical quenching (q_p), and electron transport rate of PSII (ETR) were significantly decreased under K~+ deficiency condition. In addition, the Rubisco content of GD8521 was significantly decreased in leaves. It is particularly noteworthy that the chlorophyll fluorescence parameters and Rubisco content of Tiefeng 40 were unaffected under K~+ deficiency condition. On the other hand, the non-photochemical quenching (q_N) of Tiefeng 40 was significantly increased. The dry matter weight of Tiefeng 40 was little affected under K~+ deficiency condition. Results indicated that Tiefeng 40 could avoid or relieve the destruction of PSll caused by exceeded absorbed solar energy under K-deficiency condition and maintain natural photosynthesis and plant growth. It was an essential physiological mechanism for low-K-tolerant soybean under K-deficiency stress.
关键词	CHLOROPHYLL FLUORESCENCE HIGHER-PLANTS COTTON MAIZE STRESS LEAVES YIELD ACQUISITION INHIBITION EFFICIENCY soybean potassium deficiency photosynthesis chlorophyll fluorescence Rubisco content dry matter weight
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Program for Liaoning Excellent Talents in University (LNET), China] ; [Tianzhu Mountian Scholars Support Plan of Shenyang Agricultural University, China]
CSCD记录号	CSCD:5418720
引用统计	被引频次：9[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/157834
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.Chinese Acad Agr Sci, Institute Agr Resources & Reg Planning, Beijing 100081, Peoples R China Institute Agr Resources & Reg Planning
推荐引用方式 GB/T 7714	Wang Xiaoguang,Zhao Xinhua,Jiang Chunji,et al. Effects of potassium deficiency on photosynthesis and photoprotection mechanisms in soybean (Glycine max (L.) Merr.)[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2015,14(5):856-863.
APA	Wang Xiaoguang.,Zhao Xinhua.,Jiang Chunji.,Li Chunhong.,Cong Shan.,...&Wang Chunyan.(2015).Effects of potassium deficiency on photosynthesis and photoprotection mechanisms in soybean (Glycine max (L.) Merr.).JOURNAL OF INTEGRATIVE AGRICULTURE,14(5),856-863.
MLA	Wang Xiaoguang,et al."Effects of potassium deficiency on photosynthesis and photoprotection mechanisms in soybean (Glycine max (L.) Merr.)".JOURNAL OF INTEGRATIVE AGRICULTURE 14.5(2015):856-863.