A study was conducted to detect the effect of water extracts from different parts such as root, bark, branch and leaf, of adult larch, Larix gmelini, trees on growth of Manchurian walnut, Juglans mandshudca, seedlings...A study was conducted to detect the effect of water extracts from different parts such as root, bark, branch and leaf, of adult larch, Larix gmelini, trees on growth of Manchurian walnut, Juglans mandshudca, seedlings and the allelopathy between the two tree species. Four concentrations （100 g. kg i, 50 g. kg^-1, 25 g. kg^-1 and 12.5 g. kg^-1） were prepared for each kind of extracts. Result showed that the water extracts with low and moderate concentrations accelerated the growth of collar diameter and increased biomass and root/shoot ratio of walnut seedlings. The water extracts from branches and barks with low and moderate concentrations accelerated the height growth of the seedlings, while those from leaves and roots slightly decreased the height growth of seedlings. The fact that application of water extracts of larch improved the growth of Manchurian walnut attributes possibly to the allelopathy between the two tree species.展开更多
Phenolic acids are very common compounds in pedosphere. Theobjective of this review was to summarize the current knowledge ofthe behaviors of phenolic acids in plant-soil microbe system. Whenphenolic acids originated ...Phenolic acids are very common compounds in pedosphere. Theobjective of this review was to summarize the current knowledge ofthe behaviors of phenolic acids in plant-soil microbe system. Whenphenolic acids originated form leaching, decomposition and exudationof living and dead plant tissues enter soils, they can reactphysiochemically with soil particle surfaces and/or incorporate intohumic matter. Phenolic acids desorbed from soil particle surfaces andremained in solution phase can be utilized by microbe as carbonsources and absorbed by plants.展开更多
A double haploid population derived from an-ther culture of ZYQ8/JX17, a typical indica and japonicahybrid, was used in this study. The inhibited effect ofwater-soluble extract of 123 DH pure lines leaves on the let-t...A double haploid population derived from an-ther culture of ZYQ8/JX17, a typical indica and japonicahybrid, was used in this study. The inhibited effect ofwater-soluble extract of 123 DH pure lines leaves on the let-tuce roots growth was investigated, and the QTLs analysis of rice allelopathy was carried out. Totally, four QTLs related to rice allelopathy were detected, and they were on chromo-somes 3, 9, 10 and 12, respectively. The LOD scores were3.40, 2.68. 2.75 and 3.08, respectively. Among them, additive effects of the QTLs on chromosomes 3 and 10 were 1.65 and 1.43, on chromosomes 9 and 12 were -1.44 and -1.58, re-spectively. Allelopathy characteristics of another three com-mon rice varieties were also studied.展开更多
基金This paper was supported by National Natural Science Foundation of China （No. 30400341） and Heilongjiang Provincial Science Foundation （No. C0320）Acknowledgement I thank Dr. YAN Xiu-feng for his help and guidance.
文摘A study was conducted to detect the effect of water extracts from different parts such as root, bark, branch and leaf, of adult larch, Larix gmelini, trees on growth of Manchurian walnut, Juglans mandshudca, seedlings and the allelopathy between the two tree species. Four concentrations （100 g. kg i, 50 g. kg^-1, 25 g. kg^-1 and 12.5 g. kg^-1） were prepared for each kind of extracts. Result showed that the water extracts with low and moderate concentrations accelerated the growth of collar diameter and increased biomass and root/shoot ratio of walnut seedlings. The water extracts from branches and barks with low and moderate concentrations accelerated the height growth of the seedlings, while those from leaves and roots slightly decreased the height growth of seedlings. The fact that application of water extracts of larch improved the growth of Manchurian walnut attributes possibly to the allelopathy between the two tree species.
基金Project (No. 5015103) supported by the Laboratory of Material Cycling in Pedosphere, the Chinese Academy of Sciences.
文摘Phenolic acids are very common compounds in pedosphere. Theobjective of this review was to summarize the current knowledge ofthe behaviors of phenolic acids in plant-soil microbe system. Whenphenolic acids originated form leaching, decomposition and exudationof living and dead plant tissues enter soils, they can reactphysiochemically with soil particle surfaces and/or incorporate intohumic matter. Phenolic acids desorbed from soil particle surfaces andremained in solution phase can be utilized by microbe as carbonsources and absorbed by plants.
基金supported by the National Natural Science Foundation of China(Grant No.33970409)the Natural Science Foundation of Zhejiang Province(Grant No.300221).
文摘A double haploid population derived from an-ther culture of ZYQ8/JX17, a typical indica and japonicahybrid, was used in this study. The inhibited effect ofwater-soluble extract of 123 DH pure lines leaves on the let-tuce roots growth was investigated, and the QTLs analysis of rice allelopathy was carried out. Totally, four QTLs related to rice allelopathy were detected, and they were on chromo-somes 3, 9, 10 and 12, respectively. The LOD scores were3.40, 2.68. 2.75 and 3.08, respectively. Among them, additive effects of the QTLs on chromosomes 3 and 10 were 1.65 and 1.43, on chromosomes 9 and 12 were -1.44 and -1.58, re-spectively. Allelopathy characteristics of another three com-mon rice varieties were also studied.
