PHOTOSYNTHETIC AND PHYSIOLOGICAL CHARACTERISTICS OF THREE ANGIOSPERMS OF DIFFERENT EVOLUTIONARY AGES UNDER ACID RAIN STRESS

doi:10.3773/j.issn.1005-264x.2009.01.014

Abstract

Abstract:

Aims Our aims were to reveal the effects of acid rain stress on photosynthesis of three angiosperms (Parakmeria lotungensi, Lithocarpus glaber and Carya cathayensis) of different evolutionary ages, test the hypothesis that species with longer evolutionary time have higher adaptability and interpret results in terms of vegetation reconstruction in regions with severe acid rain.
Methods Three simulated acid rain treatments were randomly applied to the species: severe acid rain (pH 2.5), moderate acid rain (pH 4.0) and control (pH 5.6). The light response curves were determined in April 2007.
Important findings Under different acid rain treatments, maximum net photosynthetic rate (P_nmax) of P. lotungensi was in the order of pH 2.5 > pH 4.0 > pH 5.6, while that of L. glaber was pH 5.6 > pH 4.0 > pH 2.5 and there were no significant differences for C. cathayensis. In the control, the order of P_nmax was L. glaber > P. lotungensi > C. cathayensis. However, in the treatments with pH ≤ 4.0, the order was P. lotungensi > L. glaber > C. cathayensis. Therefore, P. lotungensi has higher photosynthetic capacity and higher adaptability than the other two species under acid rain stress. Compared with the other two species, P. lotungensi is a more favorable species for vegetation reconstruction in regions with severe acid rain.

Key words: evolution, convergent adaptation, vegetation construction, Chinese subtropical, Parakmeria lotungensi, Lithocarpus glaber, Carya cathayensis

JIANG Fu-Wei, JIANG Hong, LI Wei, YU Shu-Quan, ZENG Bo, WANG Yan-Hong. PHOTOSYNTHETIC AND PHYSIOLOGICAL CHARACTERISTICS OF THREE ANGIOSPERMS OF DIFFERENT EVOLUTIONARY AGES UNDER ACID RAIN STRESS[J]. Chin J Plant Ecol, 2009, 33(1): 125-133.

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References 31

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项目 Item	树种 Species	重度酸雨胁迫 Severe acid rain (pH 2.5)	中度酸雨胁迫 Moderate acid rain (pH 4.0)	对照(CK) Control (pH 5.6)
最大净光合速率 P_nmax (μmol CO₂·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	9.243±1.465^a	8.463±0.498^a	7.687±0.312^ab
	石栎 Lithocarpus glaber	7.225±0.569^ab	7.893±0.445^a	10.33±1.768^a
	山核桃 Carya cathayensis	6.532±0.150^b	5.373±0.087^b	6.080±0.306^b
光饱和点 LSP (μmol·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	356.67±85.35	189.50±17.51^ab	258.00±61.37^a
	石栎 Lithocarpus glaber	317.75±15.51	223.75±26.19^a	270.25±25.06^a
	山核桃 Carya cathayensis	171.83±15.55	147.33±10.97^b	140.43±21.22^b
光补偿点 LCP (μmol·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	16.33±1.408^a	17.23±2.178^b	31.53±6.155
	石栎 Lithocarpus glaber	29.17±11.836^ab	10.58±2.150^b	16.43±3.978
	山核桃 Carya cathayensis	51.80±7.446^b	37.27±6.573^a	31.25±5.597
表观量子效率 AQE (CO₂·photon^-1)	乐东拟单性木兰 Parakmeria lotungensi	0.043±0.014	0.050±0.003	0.040±0.011
	石栎 Lithocarpus glaber	0.041±0.010	0.040±0.007	0.040±0.004
	山核桃 Carya cathayensis	0.056±0.004	0.049±0.004	0.059±0.007
暗呼吸速率 Rd (μmol·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	-0.501±0.144^a	-0.852±0.105^a	-1.130±0.182^a
	石栎 Lithocarpus glaber	-1.438±0.648^a	-0.459±0.147^a	-0.655±0.164^ab
	山核桃 Carya cathayensis	-2.763±0.236^b	-1.857±0.403^b	-1.733±0.170^b

项目 Item	树种 Species	重度酸雨胁迫 Severe acid rain (pH 2.5)	中度酸雨胁迫 Moderate acid rain (pH 4.0)	对照(CK) Control (pH 5.6)
最大净光合速率 P_nmax (μmol CO₂·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	9.243±1.465^a	8.463±0.498^a	7.687±0.312^ab
	石栎 Lithocarpus glaber	7.225±0.569^ab	7.893±0.445^a	10.33±1.768^a
	山核桃 Carya cathayensis	6.532±0.150^b	5.373±0.087^b	6.080±0.306^b
光饱和点 LSP (μmol·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	356.67±85.35	189.50±17.51^ab	258.00±61.37^a
	石栎 Lithocarpus glaber	317.75±15.51	223.75±26.19^a	270.25±25.06^a
	山核桃 Carya cathayensis	171.83±15.55	147.33±10.97^b	140.43±21.22^b
光补偿点 LCP (μmol·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	16.33±1.408^a	17.23±2.178^b	31.53±6.155
	石栎 Lithocarpus glaber	29.17±11.836^ab	10.58±2.150^b	16.43±3.978
	山核桃 Carya cathayensis	51.80±7.446^b	37.27±6.573^a	31.25±5.597
表观量子效率 AQE (CO₂·photon^-1)	乐东拟单性木兰 Parakmeria lotungensi	0.043±0.014	0.050±0.003	0.040±0.011
	石栎 Lithocarpus glaber	0.041±0.010	0.040±0.007	0.040±0.004
	山核桃 Carya cathayensis	0.056±0.004	0.049±0.004	0.059±0.007
暗呼吸速率 Rd (μmol·m^-2·s^-1)	乐东拟单性木兰 Parakmeria lotungensi	-0.501±0.144^a	-0.852±0.105^a	-1.130±0.182^a
	石栎 Lithocarpus glaber	-1.438±0.648^a	-0.459±0.147^a	-0.655±0.164^ab
	山核桃 Carya cathayensis	-2.763±0.236^b	-1.857±0.403^b	-1.733±0.170^b