[Objective] This study aimed to investigate the reason for the different leaf colors of pomegranate hybrid progeny. [Method] Spectrophotometry was used to determine the contents of three pigments, including chlorophyl...[Objective] This study aimed to investigate the reason for the different leaf colors of pomegranate hybrid progeny. [Method] Spectrophotometry was used to determine the contents of three pigments, including chlorophyll, carotenoid and anthocyanin, in the leaves of eight pomegranate individuals and their parents at growth stage. [Result] The results showed that during the early growth stage, the anthocyanin contents of four pomegranate individuals with red leaves were higher than the control, to be specific, the anthocyanin content of No.5 pomegranate individual reached the highest of 4.12 mg/g; the chlorophyll and carotenoid contents of four pomegranate individuals with yellow-green leaves showed consistent dynamic trends with the control, to be specific, the chlorophyll content and chlorophyll/carotenoid ratio of No.4 pomegranate individual reached the highest, while the chlorophyll a/carotenoid b ratio of No.3 pomegranate individual was the lowest. During vigorous growth stage, the contents of chlorophyll, carotenoid and anthocyanin of eight pomegranate individuals showed consistent dynamic trends, with no significant difference with the control. Analysis of variance indicated that there were significant differences in the contents of chlorophyll and carotenoid among different pomegranate individuals at different growth stages and in the content of anthocyanin among different pomegranate individuals, while no significant difference was observed in the chlorophyll/carotenoid ratio among different pomegranate individuals at different growth stages. [Conclusion] The differences in leaf colors among pomegranate hybrid progeny are caused by different contents and ratios of anthocyanin and chlorophyll at growth stage.展开更多
The study of green mass nutritional value of the black poplars euramerican hybrids--Populus euramericana （Dode） Guinier was conducted. The content of fodder units, digestible and crude protein, crude fat, fiber, ash...The study of green mass nutritional value of the black poplars euramerican hybrids--Populus euramericana （Dode） Guinier was conducted. The content of fodder units, digestible and crude protein, crude fat, fiber, ash, nitrogen, calcium, phosphorus, carotene and others was studied. The study showed that the leaves had greater nutritional value than stems and branches. The fresh leaves collected from the annual shoots of trees were more nutritious than annual coppice shoots of reproductive plantations but after drying the nutritional value of the materials became similar. Indicators of stems nutritional value were similar to those of wheat straw and those of leaves that were close to the nutritional value of alfalfa. Nutritional value of leafy shoots was intermediate between that of stems and leaves. Young coppice plant material is much easier to harvest than that of mature trees. Minirotation cultivation of poplars allows obtaining significant reserves of both wood and leafing biomass in a short period of time per unit area. The ＂old clones＂ of euramerican hybrids of black poplars are more winter resistant than some southern poplars of Italian breeding. This allows cultivating them not only in places of habitual areas of poplars, but also in more Northern regions.展开更多
Nutrimental requirements of heliophytic poinsettias have not yet been determined, this information is essential for developing an adequate technological package to orient producers in its management. The behavior of t...Nutrimental requirements of heliophytic poinsettias have not yet been determined, this information is essential for developing an adequate technological package to orient producers in its management. The behavior of the plant under nutritional stress needs to be known by the application of a hydroponic system. The objective of the present work was to evaluate the physiological effect of induced deficiencies of five macronutriments （nitrogen, phosphorous, potassium, calcium, and magnesium） and its influence on the pigment production of the poinsettia Euphorbia puleherrima cv. ＂Valenciana＂. The study was made during 2010 at the Research Unit ＂Dr. Ramon Fernandez Gonzalez＂ in Texcoco, State of Mexico. Six treatments were tested during 240 days from transplant in a totally randomized experimental design. Chlorophylls contents were determined at the beginning of the experiment. At the end of the treatment period, the contents of nutrients, chlorophylls, leaf carotenoids and bract anthocyanins were determined. The effects observed as results of the treatments were： reduction in plant height and diameter; the lowest content of total chlorophylls was observed in the absence of nitrogen, the largest reduction being of chlorophyll a and carotenoids; a low content of anthocyanins was observed to be associated with low nitrogen and calcium; a high correlation was found between nitrogen supplementation and measured non-destructively with a SPAD 502 Minolta unit values measured intensity of green color of leaves.展开更多
基金Supported by Science and Technology Project of He'nan Province(072102150001)Science and Technology Project of Zhengzhou City(083SGYG24123-6)~~
文摘[Objective] This study aimed to investigate the reason for the different leaf colors of pomegranate hybrid progeny. [Method] Spectrophotometry was used to determine the contents of three pigments, including chlorophyll, carotenoid and anthocyanin, in the leaves of eight pomegranate individuals and their parents at growth stage. [Result] The results showed that during the early growth stage, the anthocyanin contents of four pomegranate individuals with red leaves were higher than the control, to be specific, the anthocyanin content of No.5 pomegranate individual reached the highest of 4.12 mg/g; the chlorophyll and carotenoid contents of four pomegranate individuals with yellow-green leaves showed consistent dynamic trends with the control, to be specific, the chlorophyll content and chlorophyll/carotenoid ratio of No.4 pomegranate individual reached the highest, while the chlorophyll a/carotenoid b ratio of No.3 pomegranate individual was the lowest. During vigorous growth stage, the contents of chlorophyll, carotenoid and anthocyanin of eight pomegranate individuals showed consistent dynamic trends, with no significant difference with the control. Analysis of variance indicated that there were significant differences in the contents of chlorophyll and carotenoid among different pomegranate individuals at different growth stages and in the content of anthocyanin among different pomegranate individuals, while no significant difference was observed in the chlorophyll/carotenoid ratio among different pomegranate individuals at different growth stages. [Conclusion] The differences in leaf colors among pomegranate hybrid progeny are caused by different contents and ratios of anthocyanin and chlorophyll at growth stage.
文摘The study of green mass nutritional value of the black poplars euramerican hybrids--Populus euramericana （Dode） Guinier was conducted. The content of fodder units, digestible and crude protein, crude fat, fiber, ash, nitrogen, calcium, phosphorus, carotene and others was studied. The study showed that the leaves had greater nutritional value than stems and branches. The fresh leaves collected from the annual shoots of trees were more nutritious than annual coppice shoots of reproductive plantations but after drying the nutritional value of the materials became similar. Indicators of stems nutritional value were similar to those of wheat straw and those of leaves that were close to the nutritional value of alfalfa. Nutritional value of leafy shoots was intermediate between that of stems and leaves. Young coppice plant material is much easier to harvest than that of mature trees. Minirotation cultivation of poplars allows obtaining significant reserves of both wood and leafing biomass in a short period of time per unit area. The ＂old clones＂ of euramerican hybrids of black poplars are more winter resistant than some southern poplars of Italian breeding. This allows cultivating them not only in places of habitual areas of poplars, but also in more Northern regions.
文摘Nutrimental requirements of heliophytic poinsettias have not yet been determined, this information is essential for developing an adequate technological package to orient producers in its management. The behavior of the plant under nutritional stress needs to be known by the application of a hydroponic system. The objective of the present work was to evaluate the physiological effect of induced deficiencies of five macronutriments （nitrogen, phosphorous, potassium, calcium, and magnesium） and its influence on the pigment production of the poinsettia Euphorbia puleherrima cv. ＂Valenciana＂. The study was made during 2010 at the Research Unit ＂Dr. Ramon Fernandez Gonzalez＂ in Texcoco, State of Mexico. Six treatments were tested during 240 days from transplant in a totally randomized experimental design. Chlorophylls contents were determined at the beginning of the experiment. At the end of the treatment period, the contents of nutrients, chlorophylls, leaf carotenoids and bract anthocyanins were determined. The effects observed as results of the treatments were： reduction in plant height and diameter; the lowest content of total chlorophylls was observed in the absence of nitrogen, the largest reduction being of chlorophyll a and carotenoids; a low content of anthocyanins was observed to be associated with low nitrogen and calcium; a high correlation was found between nitrogen supplementation and measured non-destructively with a SPAD 502 Minolta unit values measured intensity of green color of leaves.
