Abstract:The endosperm haustoria of Platycodon grandiflorum A.DC were studied using themicroscopic techniques at the light and electron microscope levels.The main results areas follows: 1.The development of the endosperm is of the cellular tyep.A micropylarhaustor

Abstract:For sweet sorghum, from flowering to ripening period the 80% - 85% of the drymatter accumulation in the ear comes from the result of the photosynthesis of the samecultivating condition, the dry matter accumulation increase with the maturity of thegrains f

Abstract:This paper mainly deals with the microsporogenesis and the formation of the malegametophyte of Platycladus orientalis (L.) Franco.Primary sporogenous celle wasformed in the late August (1992);microspore mother cells (MMC) were formed in theearly Novemberl

Abstract:Histological developmental study on the adventitious root of Anemarrhena asphodelothes Bunge was carried out in this paper.The number of primary xylem poles increasedwith development of root.Meanwhile,the endodermis cell walls thickened,the Casparianstrip

Abstract:The CO2 exchange characteristics of two desert plants,Artemisia ordosica Krasch,(A) and Caragana korshinskii Kom.(C),were studied respectively in dry and rain season at Shapotou region,Tenger desert.The results showed that the photosynthetic rate(Pn) of b

Abstract:The bar gene (phosphinothricin acetyltransferase gene) in plasmid pDM302 hadbeen transferred into the immature embryos of a winter wheat cultivar (Triticum aestivum L.) "Nong Da 146" by microprojectile bombardment with JQ-700 system.Afterselection for 2-3

Abstract:用植物根系喷雾试验箱培养冬小麦茶淀红×ＭＹ９０９４、轮抗７号×山农２１５９５３的四个亲本及其两个杂种Ｆ２，研究两叶到六叶期幼苗形态性状的遗传力及幼苗形态性状与抗生的关系。

Abstract:The effects of high calcium on Tabacco generative nucleus (GN) division were studied using calcium ionophore A23187. Mature pollen grains were artificially germinated ina medium containing 10-3 mol/L calcium ions. A23187 of various concentrations wasadded

Abstract:Electron microscopes were used to study ultrastructural feature of the microspore invivo and in Vitro and the embryoid shape of isolated microspore culture in Brassica napus.The central vacuole began to disappear,and cytoplasm with abundant organelle accu

Abstract:The research go a step furture studied about the specific expression patterns,genetic coversion laws and relation biochemical quality of the peroxidases,used lots kind ofthe varieties,hybridized breed systeam F1 generation.Research show that different mat

Abstract:不同品种玉米种子，分别用５ｍｇ／Ｌ和１０ｍｇ／ＬＭｅｆｌｕｉｄｉｄｅ溶液浸泡１０ｈ后，在适宜温度和低温暗环境中，其胚根和不定根延伸生长加快。与此同时，可测得Ｍｅｆｌｕｉｄｉｄｅ处理的种苗较对照有高水平的乙烯产生。

Abstract:NADP-malic enzyme is an important decarboxylase in CAM plants.The results inpresent studies showed that the activity of NADP-malic enzyme is higher in the daytimeand lower at night in obligate CAM plant,Orostchys fimbriatus and in two facultativeCAM plant

Abstract:The effect of PP333 on seedling quality and chilling resistance of cucumber were investigated.The results proved that PP333 reduced seedling height and cotyledon area, butincreased root growth,root-shoot ratio and chlorophyll content of cotyledon,indicati

Abstract:Changes in protein profiles induced by water stress (-1. 2MPa PEG) were investigated in roots and shoot of germinating seeds of wheat.As revealed by SDS-PAGE,Two new proteins having molecular weights of 48. 4kD and 41.5kD, accumulated onlyin shoot and see

Abstract:This paper researched the effect of HgCl2 on membrane lipid peroxidation,permeability of plasma membrane, activities of protective enzymes, superoxide dismutase(SOD),catalase (CAT) and peroxidase (POD), content of soluble protein of maizeseedlings during

Abstract:The plain of the Weihe River in Guanzhong which belongs to winter wheat area ofthe Yellow and the Huaihe Rivers is the main winter wheat productive region in Shaanxiprovince,and also the important breeding base of the Yellow and the Huaihe River'sarea-.Th

Abstract:The present paper deals with the karyotype analysis of 3 species of Elymus from theQing-Zang Plateau for the first time.The karyotype formulae and karyotype types are asfollows: E. brachyaristatus A. Love, 2n = 6x = 42 = 32m + 10sm (4SAT), belonging to 2A

Abstract:The useful component (cotyledon,seed coat) of Trigonella foenumgraecum (Leguminosae) that had been vegetable gum,was degreasted and separated,then using appropriate methods,the steroidol sapogenins,fatty oil and forage additive were obtained.

Abstract:Ambient exposing was conducted to bioindicate air pollution around Lanzhou citywith Nostoc commune.The sulphur content,area of death,pH value in Nostoc communewere chosen to evaluate air quality using quantified method and fuzzy model.The resultsshow that

Abstract:The meristematic cell of root tips of Alluirn was treated by industrial effluent.There are many types of mitotic aberration,the main forms are the poly-pole division,chromosomal briges,chromosomal fragmehts,lagging chromosoms and micronuclie producing.