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Frontiers of Agriculture in China

ISSN 1673-7334

ISSN 1673-744X(Online)

CN 11-5729/S

Front Agric Chin    2009, Vol. 3 Issue (3) : 353-358     DOI: 10.1007/s11703-009-0056-4
RESEARCH ARTICLE |
Effect of extracts of Chinese pine on its own seed germination and seedling growth
Meiqiu ZHU(), Changming MA, Ying WANG, Lili ZHANG, Hui WANG, Yuxin YUAN, Kejiu DU()
College of Forestry, Agricultural University of Hebei, Baoding 071000, China
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Abstract  

The allelopathic potential of Chinese pine (Pinus tabulaeformis Carr.) against its own seed germination and seedling growth was tested with aqueous extracts (0.01, 0.02, 0.05, and 0.10 g·mL-1) obtained from different organs (roots and litter needles) at different individual ages (12, 52, and 110 years old). The results showed that root and litter extracts had different effects on seed germination and seedling growth, and the effects varied with the concentrations, the organs, and the tree age of extracts. The strongest stimulatory effect on seed germination of Chinese pine was exposed to 0.02 g·mL-1 root extract from the 110 years old Chinese pine trees and exposed to 0.02 g·mL-1 litter extract from the 12 years oldChinese pine trees. Meanwhile, the strongest stimulatory effect on growth of Chinese pine seedlings was exposed not only to 0.01 g·mL-1 root extracts from the 110 years old Chinese pine but also to 0.01 g·mL-1 litter extract from the 12 years old Chinese pine. The promoting effect of the extracts of root on seed germination and seedling growth increased in the order of 12, 52, and 110 years old. The promoting effect of the extracts of litter on seed germination and seedling growth increased in the order of 110, 52, and 12 years old. Our results suggested that litter leachates or root exudates of Chinese pine may influence the natural regeneration within Chinese pine stands via the release of allelochemicals into the environment.

Keywords Chinese pine(Pinus tabulaeformis Carr.)      allelopathy      age      root      litter      aqueous extracts     
Corresponding Authors: ZHU Meiqiu,Email:zhumeiqiu_08@126.com; DU Kejiu,Email:dukejiu@yahoo.com.cn   
Issue Date: 05 September 2009
URL:  
http://academic.hep.com.cn/fag/EN/10.1007/s11703-009-0056-4     OR     http://academic.hep.com.cn/fag/EN/Y2009/V3/I3/353
concentration/(g·mL-1)tree age/agermination rate/%germination indexradicle length/cmhypocotyl length/cm
0.01CK46.67±1.45c1.77±0.15c2.54±0.14c3.47±0.22c
1252.67±2.40b2.27±0.09b2.86±0.08bc4.50±0.18b
5255.00±0.58b2.32±0.12b3.15±0.12ab4.72±0.16b
11067.67±1.45a3.67±0.15a3.45±0.16a5.69±0.32a
0.02CK46.67±1.45c1.77±0.15c2.54±0.14b3.47±0.22b
1264.33±1.20b2.92±0.12b2.53±0.14b3.65±0.21b
5264.67±0.88b3.14±0.19b3.08±0.17a3.55±0.12b
11072.67±1.76a3.95±0.17a3.27±0.12a4.34±0.15a
0.05CK46.6±1.45c1.77±0.15bc2.54±0.14a3.47±0.22b
1247.33±2.38c1.58±0.18c1.80±0.15b3.16±0.14b
5253.33±0.67b2.18±0.13b2.49±0.10a3.32±0.08b
11059.33±1.56a3.16±0.04a2.67±0.09a4.12±0.17a
0.10CK46.67±1.45a1.77±0.15a2.54±0.14a3.47±0.22a
1228.67±4.05c0.70±0.10b1.39±0.12c2.53±0.20b
5240.67±2.91b1.15±0.10c2.26±0.10ab2.62±0.19b
11052.00±1.15a2.18±0.03a2.08±0.11b3.27±0.08a
Tab.1  Effect of root aqueous extracts from three ages of Chinese pine trees on their seed germination and seedling growth
concentration/(g·mL-1)tree age/agermination rate/%germination indexradicle/cmhypocotyl/cm
0.01CK46.67±1.45c1.77±0.15c2.54±0.14bc3.47±0.22c
1252.00±1.56b2.35±0.12b3.45±0.12a4.67±0.10a
5256.67±1.72b2.21±0.08b3.15±0.08a4.25±0.15b
11065.00±1.25a2.52±0.04a2.90±0.17b4.17±0.13b
0.02CK46.67±1.45d1.77±0.15c2.54±0.14b3.47±0.22c
1268.00±1.23a2.81±0.16a2.93±0.13a5.22±0.08a
5263.33±0.97b2.50±0.19ab2.75±0.17ab3.83±0.12b
11055.67±1.52c2.16±0.12b2.45±0.12b3.42±0.22c
0.05CK46.67±1.45c1.77±0.15b2.54±0.14a3.47±0.22bc
1256.33±1.72a2.48±0.09a2.72±0.09a4.183±0.16a
5251.67±1.56a2.33±0.05a2.43±0.18a3.42±0.17b
11048.67±0.67c1.89±0.13b1.93±0.13b3.02±0.09c
0.10CK46.67±1.45a1.77±0.15b2.54±0.14a3.47±0.22a
1248.33±2.38a2.19±0.12a2.12±0.15ab3.52±0.08b
5242.67±1.72ab1.84±0.10b1.95±0.12bc2.63±0.12c
11039.33±1.20bc1.57±0.13b1.73±0.10c2.57±0.10c
Tab.2  Effect of litter aqueous extracts from three ages of Chinese pine trees on their own seeds germination and seedling growth
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