EFFECTS OF ELEVATED CO2 CONCENTRATION ON PHOTOSYNTHSIS, GROWTH AND DEVELOPMENT OF THE BROMELIAD GUZMANIA

doi:10.3773/j.issn.1005-264x.2008.02.021

Abstract

Abstract:

Aims Our objective was to determine the effects of elevated CO₂ concentration on photosynthetic characteristics, growth rate, flowering percentage and activity of photosynthetic enzyme in Guzmania 'Denise' and Guzmania 'Cherry'.
Methods We measured P_n, G_s and T_r under various growth conditions using the Li-6400 and used the data to calculate WUE (water use efficiency, WUE=P_n/T_r). We determined chlorophyll and total soluble sugar levels by the method of Zhang & Qu (2003), starch content by the method of Xu et al. (1998) and rubisco and glycolic acid oxidase levels by the method of Ye et al. (1993).
Important findings Under two elevated CO₂ concentrations, net photosynthetic rate increased by 6.24%-31.91% and 11.92%-41.48% over plants grown in ambient CO₂ concentration during 30 d. Elevated CO₂ concentration caused a marked rise in soluble sugar and starch accumulation in leaves, but significantly reduced stomatal conductance and transpiration rate. In addition, Rubisco activity was increased, and glycolate oxidase activity obviously was decreased. Plant height and leaf area increased 6.94%-14.63% and 1.66%-7.06% over plants grown in ambient CO₂. There were 9.71%-20.85% and 2.87%-11.62% increases for (900±40) μmol CO₂·mol^-1. Dry and fresh weights also increased with elevated CO₂ concentration, as was flowering in Guzmania 'Cherry'.

Key words: Guzmania 'Denise', Guzmania 'Cherry', net photosynthetic rate, CO₂, growth

HUI Jun-Ai, YE Qing-Sheng. EFFECTS OF ELEVATED CO₂ CONCENTRATION ON PHOTOSYNTHSIS, GROWTH AND DEVELOPMENT OF THE BROMELIAD GUZMANIA[J]. Chin J Plant Ecol, 2008, 32(2): 424-430.

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Figures/Tables 6

References 21

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	时间 Time(d)	处理	可溶性糖 Soluble sugar (mg·g^-1 DW)	淀粉 Starch (mg·g^-1 FW)	叶绿素 Chlorophyll
	时间 Time(d)	处理	可溶性糖 Soluble sugar (mg·g^-1 DW)	淀粉 Starch (mg·g^-1 FW)	a+b(mg·g^-1 FW)	a/b
丹尼斯凤梨 Guzmania 'Denise'	0	CK	7.27±0.32	8.12±0.25	1.60±0.18	2.31±0.21
	10	CK	7.75±0.84	8.20±0.87	1.55±0.24	2.23±0.17
		T₁	8.53±0.32	8.95±1.45	1.72±0.17	2.40±0.22
		T₂	9.15±1.20	9.49±1.58	1.79±0.32	2.41±0.25
	20	CK	8.35±0.95^b	7.63±1.24^c	1.22±0.29	2.11±0.12
		T₁	9.17±0.75^b	9.78±2.06^b	1.47±0.27	2.33±0.31
		T₂	11.35±1.23^a	11.26±3.71^a	1.60±0.18	2.34±0.18
	30	CK	10.12±0.85^b	8.85±0.95	1.21±0.17	2.29±0.18
		T₁	11.42±0.52^a	9.75±1.32	1.13±0.19	2.06±0.12
		T₂	13.11±1.45^a	10.43±1.75	1.11±0.21	2.13±0.31
吉利凤梨 Guzmania 'Cherry'	0	CK	8.15±0.32	7.85±0.25	2.40±0.22	2.30±0.33
	10	CK	9.75±0.60	8.13±0.93	2.39±0.31	2.21±0.18
		T₁	10.47±0.52	8.65±0.52	1.72±0.16	2.04±0.14
		T₂	11.65±0.93	9.35±0.71	1.58±0.21	2.05±0.17
	20	CK	10.35±0.42^b	8.35±0.31^b	1.56±0.15	2.35±0.18
		T₁	11.75±0.20^a	9.65±0.52^a	1.57±0.24	2.14±0.12
		T₂	12.66±0.62^a	10.25±0.75^a	1.47±0.17	2.06±0.11
	30	CK	11.31±0.60^b	8.52±0.93^b	1.39±0.31	2.20±0.16
		T₁	13.12±0.52^a	10.12±0.52^a	1.36±0.24	2.35±0.11
		T₂	14.95±0.93^a	11.35±0.71^a	1.30±0.15	2.14±0.31

	时间 Time(d)	处理	可溶性糖 Soluble sugar (mg·g^-1 DW)	淀粉 Starch (mg·g^-1 FW)	叶绿素 Chlorophyll
	时间 Time(d)	处理	可溶性糖 Soluble sugar (mg·g^-1 DW)	淀粉 Starch (mg·g^-1 FW)	a+b(mg·g^-1 FW)	a/b
丹尼斯凤梨 Guzmania 'Denise'	0	CK	7.27±0.32	8.12±0.25	1.60±0.18	2.31±0.21
	10	CK	7.75±0.84	8.20±0.87	1.55±0.24	2.23±0.17
		T₁	8.53±0.32	8.95±1.45	1.72±0.17	2.40±0.22
		T₂	9.15±1.20	9.49±1.58	1.79±0.32	2.41±0.25
	20	CK	8.35±0.95^b	7.63±1.24^c	1.22±0.29	2.11±0.12
		T₁	9.17±0.75^b	9.78±2.06^b	1.47±0.27	2.33±0.31
		T₂	11.35±1.23^a	11.26±3.71^a	1.60±0.18	2.34±0.18
	30	CK	10.12±0.85^b	8.85±0.95	1.21±0.17	2.29±0.18
		T₁	11.42±0.52^a	9.75±1.32	1.13±0.19	2.06±0.12
		T₂	13.11±1.45^a	10.43±1.75	1.11±0.21	2.13±0.31
吉利凤梨 Guzmania 'Cherry'	0	CK	8.15±0.32	7.85±0.25	2.40±0.22	2.30±0.33
	10	CK	9.75±0.60	8.13±0.93	2.39±0.31	2.21±0.18
		T₁	10.47±0.52	8.65±0.52	1.72±0.16	2.04±0.14
		T₂	11.65±0.93	9.35±0.71	1.58±0.21	2.05±0.17
	20	CK	10.35±0.42^b	8.35±0.31^b	1.56±0.15	2.35±0.18
		T₁	11.75±0.20^a	9.65±0.52^a	1.57±0.24	2.14±0.12
		T₂	12.66±0.62^a	10.25±0.75^a	1.47±0.17	2.06±0.11
	30	CK	11.31±0.60^b	8.52±0.93^b	1.39±0.31	2.20±0.16
		T₁	13.12±0.52^a	10.12±0.52^a	1.36±0.24	2.35±0.11
		T₂	14.95±0.93^a	11.35±0.71^a	1.30±0.15	2.14±0.31

	时间 Time(d)	CO₂	核酮糖1,5二磷酸羧化酶活性 Rubisco activity (CO₂ nmol·mg^-1 protein·min^-1)	乙醇酸氧化酶活性 Glycolate oxidase activity (Glyoxylate μmol·mg^-1 protein·min^-1)
丹尼斯凤梨 Guzmania 'Denise'	0	CK	11.86±0.72	20.07±2.35
	10	CK	12.15±0.84	20.12±2.05^a
		T₁	12.41±0.56	18.65±1.21^b
		T₂	12.64±1.34	17.82±1.34^b
	20	CK	12.37±0.97^b	20.95±2.24^a
		T₁	12.72±0.85^b	17.12±1.76^b
		T₂	13.87±0.74^a	16.95±1.43^b
	30	CK	12.48±0.85^b	21.08±1.95^a
		T₁	13.56±0.78^b	16.66±1.32^b
		T₂	14.75±1.25^a	15.46±1.25^b
吉利凤梨 Guzmania 'Cherry'	0	CK	14.86±1.12	22.07±2.75
	10	CK	15.02±1.45	22.38±1.93
		T₁	15.26±1.34	21.35±1.55
		T₂	15.61±0.94	20.75±1.85
	20	CK	15.32±0.42^b	22.75±2.52^a
		T₁	15.75±0.63^b	20.16±1.52^b
		T₂	16.55±0.75^a	19.45±1.15^b
	30	CK	15.48±0.45^b	23.08±2.93^a
		T₁	16.56±1.15^b	18.66±1.35^b
		T₂	17.75±1.47^a	17.46±0.75^b

	时间 Time(d)	CO₂	核酮糖1,5二磷酸羧化酶活性 Rubisco activity (CO₂ nmol·mg^-1 protein·min^-1)	乙醇酸氧化酶活性 Glycolate oxidase activity (Glyoxylate μmol·mg^-1 protein·min^-1)
丹尼斯凤梨 Guzmania 'Denise'	0	CK	11.86±0.72	20.07±2.35
	10	CK	12.15±0.84	20.12±2.05^a
		T₁	12.41±0.56	18.65±1.21^b
		T₂	12.64±1.34	17.82±1.34^b
	20	CK	12.37±0.97^b	20.95±2.24^a
		T₁	12.72±0.85^b	17.12±1.76^b
		T₂	13.87±0.74^a	16.95±1.43^b
	30	CK	12.48±0.85^b	21.08±1.95^a
		T₁	13.56±0.78^b	16.66±1.32^b
		T₂	14.75±1.25^a	15.46±1.25^b
吉利凤梨 Guzmania 'Cherry'	0	CK	14.86±1.12	22.07±2.75
	10	CK	15.02±1.45	22.38±1.93
		T₁	15.26±1.34	21.35±1.55
		T₂	15.61±0.94	20.75±1.85
	20	CK	15.32±0.42^b	22.75±2.52^a
		T₁	15.75±0.63^b	20.16±1.52^b
		T₂	16.55±0.75^a	19.45±1.15^b
	30	CK	15.48±0.45^b	23.08±2.93^a
		T₁	16.56±1.15^b	18.66±1.35^b
		T₂	17.75±1.47^a	17.46±0.75^b

时间 Time(d)	处理 Treatment	丹尼斯凤梨 Guzmania 'Denise'		吉利凤梨Guzmania 'Cherry'
时间 Time(d)	处理 Treatment	株高 Plant height (cm)	叶面积 Leaf area (cm²)	株高 Plant height (cm)	叶面积 Leaf area (cm²)	开花率 Flowering rate(%)
0	CK	24.56±0.46	96.25±4.52	23.40±0.60	92.23±1.56	0
10	CK	25.42±1.35	97.39±6.65	24.12±0.44	94.75±1.35	0
	T₁	27.65±1.62	99.01± 6.55	27.65±0.72	99.45±1.65	0
	T₂	30.72±1.65	102.08±8.25	28.05±0.60	101.25±2.25	0
20	CK	27.82±2.45	98.83±5.35	25.75±1.15^b	96.35±2.15^c	0
	T₁	29.75±2.32	101.67±8.35	27.75±0.86^a	103.15±2.16^b	0
	T₂	32.63±1.67	104.98±10.85	28.25±0.75^a	107.55±1.03^a	0
30	CK	28.34±0.45^b	99.25±4.55^b	26.45±0.72^b	98.85±2.65^b	0^C
	T₁	31.45±0.87^a	103.53±6.35^ab	28.86±0.44^a	102.25±2.86^ab	10^B
	T₂	33.26±1.32^a	106.75±10.75^a	30.33±0.60^a	105.35±2.66^a	20^A

EFFECTS OF ELEVATED CO₂ CONCENTRATION ON PHOTOSYNTHSIS, GROWTH AND DEVELOPMENT OF THE BROMELIAD GUZMANIA

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	时间 Time (d)	处理 Treatment	鲜重 Fresh weight (g)	干重 Dry weight (g)
丹尼斯凤梨Guzmania‘Denise’	0	CK	96.31±7.65	15.61±0.65
	30	CK	127.39±11.41^c	21.42±1.35^c
		T₁	148.37±18.48^b	24.27±1.77^b
		T₂	165.23±16.68^a	27.37±1.41^a
吉利凤梨Guzmania‘Cherry’	0	CK	142.75±6.52	25.65±7.43
	30	CK	175.38±10.41^c	30.12±6.21^B
		T₁	204.45±15.61^b	32.97±6.41^B
		T₂	228.75±16.38^a	38.75±8.77^A

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