Chin J Plan Ecolo ›› 1999, Vol. 23 ›› Issue (2): 161-170.

• Research Articles • Previous Articles     Next Articles

Physio-ecological Study on the Seed Germination and Seeding Growth in Four Legume Tree Species under Elevated CO2 Concentration

Chen Zhanghe, Lin Fengping and Zhang Deming   

  • Online:1999-02-10 Published:1999-02-10
  • Contact: Shen Shuanghe

Abstract: The effects of elevated CO2 concentration (550×10-6±50×10-6) on the seed germination and seedling growth of four legume tree species in the lower subtropical forest in Guangdong province were investigated. Higher germination rate (12%) was observed in the elevated CO2 concentration than in ambient CO2 concentration (about 350 × 10-6)for Ormosia glaberrima seeds, but no significant difference was found for other species. Seedlings of the four species produced more root noduls in the elevated CO2 concentration than in ambient CO2 concentration. Nitrogen fixation activities, including TNA and SNA, and content of soluble sugar in root nodule increased in the higher CO2. Net photosynthetic rate of the seedlings of the four species growing in the elevated CO2 environment increased by about 66.7 % ~ 105.9 % ,compared with that growing in ambient CO2. As they were no significant difference in photosynthetic rate was found between the seedlings growing in the high and ambient CO2 concentration measured in the same CO2 concentration (in the high and ambient CO2 concentration respectively). Dark respiratory rate of the leaves of the seedlings growing in the high concentration was not significantly different from that growing in ambient CO2. Total dry matter of the seedling increased in the high CO2 concentration by about 29.79 % ~ 50.30 %. Albizzia lebbeck and Pithecellobium clypearia had significantly higher seedlings in the elevated CO2 concentration than in ambient CO2 concentration, but O. glaberrima and Ormosia pachycarpa had only slightly higher ones. Relative growth rate and unit leaf rate of the seedlings of 30 to 50 days were higher in CO2 enrichment condition, but it was reverse for leaf area ratio. The response to high CO2 concentration was different among the four species. Seedlings of A. lebbeck and P. clypearia showed the most obvious response ,and the two shade-tolerant species, (O. glaberrima and O. pachycarpa) showed the slight response to the elevated CO2 environment.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Luo Bing-shan. Progress in Applied Research of Plant Hormones[J]. Chin Bull Bot, 1995, 12(专辑3): 50 -52 .
[2] . [J]. Chin Bull Bot, 1998, 15(专辑): 47 -50 .
[3] Yong Zhuang;Longzheng Chen;Yingui Yang;Qunfeng Lou;Jinfeng Chen . Changes in Gene Expression in Evolution of Plant Allopolyploids[J]. Chin Bull Bot, 2006, 23(2): 207 -214 .
[4] Li Zhou;Xianghong Meng;Chengsheng Liu;Lejun Yu;Xiguang Chen . Effects of Osmotic Stress on Intracellular Glycerol Content and Enzyme Activity in Dunaliella salina[J]. Chin Bull Bot, 2006, 23(2): 145 -151 .
[5] Zhang Li-yun. The Characteristics of Aboveground Phytomass for A Haloxylon Persicum Phytocommunity[J]. Chin Bull Bot, 1985, 3(03): 52 -54 .
[6] ZHOU Qin JIANG Dong DAI Ting-Bo JING Qi CAO Wei-Xing. Effect of Glutamine on Content of Starch, Protein and Protein Components in Grains of in Vitro-cultured Wheat Spikes[J]. Chin Bull Bot, 2005, 22(05): 549 -554 .
[7] Dong Wei-xiang. Phloem Proteins in Higher Plants[J]. Chin Bull Bot, 1984, 2(23): 1 -6 .
[8] Cai Ji-jiong. Tissue Conductance Technique of Plant Specimens[J]. Chin Bull Bot, 1988, 5(02): 117 -118 .
[9] DING Shi-Ping;YAN Ju-Qiang and JI Dao-Fan. Effect of Sugar Sources on Plant Tissue Culture[J]. Chin Bull Bot, 1998, 15(06): 42 -46 .
[10] LIANG Yu GAO Yu-Bao. Effects of Endophyte Infection on Growth,Development and Stress Resistance of Plants[J]. Chin Bull Bot, 2000, 17(01): 52 -59 .