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Models analyses for allelopathic effects of chicory at equivalent coupling of nitrogen supply and pH level on F. arundinacea, T. repens and M. sativa.

Wang Q, Xie B, Wu C, Chen G, Wang Z, Cui J, Hu T, Wiatrak P - PLoS ONE (2012)

Bottom Line: The results suggested a positive effect of nitrogen supply and pH level on allelochemical secretion from chicory plants.The nitrogen supply and pH level were located at a rectangular area defined by 149 to 168 mg/l nitrogen supply combining 4.95 to 7.0 pH value and point located at nitrogen supply 177 mg/l, pH 6.33 when they were in equivalent coupling effects; whereas the inhibitory effects of equivalent coupling nitrogen supply and pH level were located at rectangular area defined by 125 to 131 mg/l nitrogen supply combining 6.71 to 6.88 pH value and two points respectively located at nitrogen supply 180 mg/l with pH 6.38 and nitrogen supply 166 mg/l with pH 7.59.Additionally, we determined the phenolics contents of root and leaf aqueous extracts, which were 0.104% and 0.044% on average, respectively.

View Article: PubMed Central - PubMed

Affiliation: Department of Grassland Science, College of Animal Sciences and Technology, Northwest Agriculture and Forestry University, Yangling, Shaanxi Province, People's Republic of China. wangquanzhen191@163.com

ABSTRACT
Alllelopathic potential of chicory was investigated by evaluating its effect on seed germination, soluble sugar, malondialdehyde (MDA) and the chlorophyll content of three target plants species (Festuca arundinacea, Trifolium repens and Medicago sativa). The secretion of allelochemicals was regulated by keeping the donor plant (chicory) separate from the three target plant species and using different pH and nitrogen levels. Leachates from donor pots with different pH levels and nitrogen concentrations continuously irrigated the target pots containing the seedlings. The allelopathic effects of the chicory at equivalent coupling of nitrogen supply and pH level on the three target plants species were explored via models analyses. The results suggested a positive effect of nitrogen supply and pH level on allelochemical secretion from chicory plants. The nitrogen supply and pH level were located at a rectangular area defined by 149 to 168 mg/l nitrogen supply combining 4.95 to 7.0 pH value and point located at nitrogen supply 177 mg/l, pH 6.33 when they were in equivalent coupling effects; whereas the inhibitory effects of equivalent coupling nitrogen supply and pH level were located at rectangular area defined by 125 to 131 mg/l nitrogen supply combining 6.71 to 6.88 pH value and two points respectively located at nitrogen supply 180 mg/l with pH 6.38 and nitrogen supply 166 mg/l with pH 7.59. Aqueous extracts of chicory fleshy roots and leaves accompanied by treatment at different sand pH values and nitrogen concentrations influenced germination, seedling growth, soluble sugar, MDA and chlorophyll of F. arundinacea, T. repens and M. sativa. Additionally, we determined the phenolics contents of root and leaf aqueous extracts, which were 0.104% and 0.044% on average, respectively.

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Nitrogen and pH equivalent coupling effects of models for the effects of aquatic lixivium of chicory leaf on the radicle and hypocotyl length of the three plants.
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pone-0031670-g006: Nitrogen and pH equivalent coupling effects of models for the effects of aquatic lixivium of chicory leaf on the radicle and hypocotyl length of the three plants.

Mentions: However, the curves of the quadratic models of radicles and hypocotyls lengths at aquatic lixivium of leaves were shown that the lengths of radicles and hypocotyls had minimum values on equivalent coupling effects of X1 and X2 (Fig. 6). It indicated that the coupling effects of X1 and X2 inhibited the growths of radicles and hypocotyls. Therefore, the responding X1 and X2 of minimum points compose ranges of the inhibitory effects as 1.93<X1<2.02 and 1.22<X2<1.25 respectively. The ranges decoded as 125 mg/l<nitrogen (X1)<131 mg/l and 6.71<pH (X2)<6.88 (Table 2 and Fig. 6).


Models analyses for allelopathic effects of chicory at equivalent coupling of nitrogen supply and pH level on F. arundinacea, T. repens and M. sativa.

Wang Q, Xie B, Wu C, Chen G, Wang Z, Cui J, Hu T, Wiatrak P - PLoS ONE (2012)

Nitrogen and pH equivalent coupling effects of models for the effects of aquatic lixivium of chicory leaf on the radicle and hypocotyl length of the three plants.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3285180&req=5

pone-0031670-g006: Nitrogen and pH equivalent coupling effects of models for the effects of aquatic lixivium of chicory leaf on the radicle and hypocotyl length of the three plants.
Mentions: However, the curves of the quadratic models of radicles and hypocotyls lengths at aquatic lixivium of leaves were shown that the lengths of radicles and hypocotyls had minimum values on equivalent coupling effects of X1 and X2 (Fig. 6). It indicated that the coupling effects of X1 and X2 inhibited the growths of radicles and hypocotyls. Therefore, the responding X1 and X2 of minimum points compose ranges of the inhibitory effects as 1.93<X1<2.02 and 1.22<X2<1.25 respectively. The ranges decoded as 125 mg/l<nitrogen (X1)<131 mg/l and 6.71<pH (X2)<6.88 (Table 2 and Fig. 6).

Bottom Line: The results suggested a positive effect of nitrogen supply and pH level on allelochemical secretion from chicory plants.The nitrogen supply and pH level were located at a rectangular area defined by 149 to 168 mg/l nitrogen supply combining 4.95 to 7.0 pH value and point located at nitrogen supply 177 mg/l, pH 6.33 when they were in equivalent coupling effects; whereas the inhibitory effects of equivalent coupling nitrogen supply and pH level were located at rectangular area defined by 125 to 131 mg/l nitrogen supply combining 6.71 to 6.88 pH value and two points respectively located at nitrogen supply 180 mg/l with pH 6.38 and nitrogen supply 166 mg/l with pH 7.59.Additionally, we determined the phenolics contents of root and leaf aqueous extracts, which were 0.104% and 0.044% on average, respectively.

View Article: PubMed Central - PubMed

Affiliation: Department of Grassland Science, College of Animal Sciences and Technology, Northwest Agriculture and Forestry University, Yangling, Shaanxi Province, People's Republic of China. wangquanzhen191@163.com

ABSTRACT
Alllelopathic potential of chicory was investigated by evaluating its effect on seed germination, soluble sugar, malondialdehyde (MDA) and the chlorophyll content of three target plants species (Festuca arundinacea, Trifolium repens and Medicago sativa). The secretion of allelochemicals was regulated by keeping the donor plant (chicory) separate from the three target plant species and using different pH and nitrogen levels. Leachates from donor pots with different pH levels and nitrogen concentrations continuously irrigated the target pots containing the seedlings. The allelopathic effects of the chicory at equivalent coupling of nitrogen supply and pH level on the three target plants species were explored via models analyses. The results suggested a positive effect of nitrogen supply and pH level on allelochemical secretion from chicory plants. The nitrogen supply and pH level were located at a rectangular area defined by 149 to 168 mg/l nitrogen supply combining 4.95 to 7.0 pH value and point located at nitrogen supply 177 mg/l, pH 6.33 when they were in equivalent coupling effects; whereas the inhibitory effects of equivalent coupling nitrogen supply and pH level were located at rectangular area defined by 125 to 131 mg/l nitrogen supply combining 6.71 to 6.88 pH value and two points respectively located at nitrogen supply 180 mg/l with pH 6.38 and nitrogen supply 166 mg/l with pH 7.59. Aqueous extracts of chicory fleshy roots and leaves accompanied by treatment at different sand pH values and nitrogen concentrations influenced germination, seedling growth, soluble sugar, MDA and chlorophyll of F. arundinacea, T. repens and M. sativa. Additionally, we determined the phenolics contents of root and leaf aqueous extracts, which were 0.104% and 0.044% on average, respectively.

Show MeSH
Related in: MedlinePlus