Waseem SHAHRIInayatullah TAHIRSheikh Tajamul ISLAMMushtaq Ahmad BHAT...
382-387页
查看更多>>摘要：A study was undertaken to assess the effect of different storage temperatures on senescence and postharvest performance of isolated flowers of Ranunculus asiaticus L..The main aim of the work was to develop a cost-effective storage protocol to reduce the postharvest losses and to bring out the transportation of cut flowers ofR.asiaticus.The flowers were subjected to two different storage treatments,dry storage and wet storage,and their postharvest performance was compared under laboratory conditions.For this purpose,the buds were harvested at 8:00 AM at loose bud stage (Stage Ⅱ of flower development).The harvested buds were cut to a uniform size of 15 cm and processed for dry or wet storage.For dry storage,the buds were packed after wrapping them in moistened filter papers and kept at 5℃ and 10℃.For wet storage,the buds were held in distilled water in separate glass beakers kept at 5℃ and 10℃,respectively.A separate set of buds each for dry and wet storage was kept at room temperature (15±2)℃.After 72 h storage,the buds were kept at room temperature in distilled water.The average life of an individual flower that opened fully was about 4-5 days.The buds kept under wet storage at 5℃ and 10℃ for 72 h maintained their premature status,while the buds held at room temperature for 72 h generally bloomed.All the buds stored dry maintained their premature status irrespective of storage temperature.Storage of buds for 72 h at 5℃,followed by transferring to distilled water improved the longevity by about 5 to 6 days.Cold storage treatment before transferring to holding solution improved floral diameter,membrane integrity besides maintaining higher fresh and dry mass of flowers,sugar content,soluble proteins,and phenols.Our results suggested that wet and dry storage of premature buds ofR.asiaticus for 72 h at 5℃,followed by placing them in distilled water,improved the cut flower longevity and can be used as effective postharvest storage treatments for this beautiful cut flower.
查看更多>>摘要：An online extraction method for monitoring CO2 concentration during soil respiration is described based on the assay of gas pump and gas extraction with a dynamic air chamber.Also,a study is done on the relationship between data collected from online CO2 measurement and time,as well as the curve fitting.This method uses the optimization algorithm to extract the CO2 concentration in the soil respiration chamber,and sets up a mathematical model for online soil CO2 concentration extraction.It is verified that the extraction method is feasible with the automatic site detection.This method,which can reduce the volume of data redundancy and improve data reliability,has a high reference value for the similar characteristics of online data extraction,compared with the traditional CO2 detection methods during soil respiration.
查看更多>>摘要：Iran supports five different vegetation zones.One of those is the lrano-Touranian zone that is located in the northeast of Iran.This vegetation zone includes arid and semi-arid lands,and its area is about 3.5 million hm2.It supports growth of pistachio (Pistacia vera),a deciduous-broadleaved species,which is one of the ecologically and economically most important native species.In this study,we analyzed three images acquired by ALOS satellite,including 10 m resolution multispectral band (AVNIR-2),2.5 m resolution “Backward” PRISM image,and 2.5 m resolution “Nadir” PRISM image,based on a provided rational polynomial coefficient (RPC).Using the “Backward” and “Nadir” images,a 2.5 m resolution digital elevation model (DEM) was produced.Four methods with AVNIR-2 and PRISM data were used to produce pan-sharpening images and conduct an object-based feature extraction process.Normalized Difference Vegetation Index (NDVI) was used to determine the maximum distribution of pistachio in related elevation.The accuracy of the DEM was tested on 28 ground control points in the pair image as tie points,with the value of parallax error of 0.9027 m.The created elevation map indicated that pistachio trees grow up at 650 m above sea level (a.s.l.).The result from NDVI in the related elevation showed the maximum density of pistachio at 800 m a.s.l.In addition,the result of feature extraction in the forest showed the area of each target element calculated.The results of this research will improve decision-making and lead to sustainable management in general.
查看更多>>摘要：A full length cDNA encoding HMGR (designated as GuHMGR) was isolated from liquorice (Glycyrrhiza uralensis) based on degenerated PCR and genome walking.The full length cDNA of GuHMGR was 2330 bp with a 1518- bp open reading frame (ORF) encoding a 505-aa polypeptide.Bioinformatics analysis indicated that there were two trans-membrane domains in GuHMGR.A molecular model of tertiary structure showed that GuHMGR is a novel HMGR with a similar spatial structure to other plant HMGRs.The deduced polypeptide of GuHMGR has an isoelectric point (pl) of 6.41 and a calculated molecular weight of about 54.7 kDa.Sequence comparison and phylogenetic tree analysis showed that GuHMGR had the highest homology with HMGRs from Pisum sativum and Medicago truncatula,indicating that GuHMGR belongs to the plant HMGR group.Expression analysis showed the similar amount of transcript level of GuHMGR in roots and leaves,suggesting that this gene was expressed constitutively in plants.Therefore,this novel HMGR gene would possibly provide a new strategy for studying the glycyrrhizin metabolism at the molecular level in the future.
查看更多>>摘要：Uniform design methodology and response surface methodology were used to determine the optimum conditions for hawthorn-Yali pear wine.By using uniform design,the effects of fermentation temperature,sugar content,the ratio of hawthorn to pear,soaking time of hawthorn,additional volume of SO2,and yeast dosage on sensory quality were investigated,which indicated that the first three aspects were of great significance to the sensory quality.By using three-factor,three-level response surface methodology,a prediction model was established in the form of quadratic polynomial regression equation,with the best processing conditions hereby determined under the conditions of fermentation temperature (25.18℃),sugar content (22.00％),the ratio of hawthorn to pear (21.19∶100),and the alcohol degree (11.05 (V/V ％)).
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