Abstract:利用聚丙烯酰胺凝胶电泳对小麦品种天选15号、天选15号—4D缺体,黑麦品种德国白粒及利用“缺体回交法”培育的小麦(4D)一黑麦(4R)异代换系幼苗的过氧化物酶同工酶、细胞色素氧化酶同工酶及酯酶同工酶进行了研究,结果表明4D染色体对小麦的一种过氧化物酶同工酶和一种细胞色素氧化酶同工酶量的合成具有控制作用,在小麦4D缺体的遗传背景下,黑麦4R染色体能够补偿由于4D缺失引起的这两种同工酶合成降低的效应。4D对小麦幼苗期酯酶同工酶的合成没有明显的作用,4R在小麦4D缺体遗传背景下对酯酶同工酶的合成也没有明显的影响

Abstract:Five Chinese cultivars of GossyPium hirsutum L.were cultured and observed.Two kinds of calli formed in all cultivars when the hypocotyls were cultured on the MS or LS medium supplemened with IAA 2mg/l and KT 1mg/L. One is fragile and light green or grey c

Abstract:Rape mesophyll cells can be de-differentiated to non-differenti ated cells with divisibility on suitable callus culture medium. Due to cytoplasm rapid increase, their vacuole membranes often occure endocytosis and form some cytoplasm protruberances extend

Abstract:It was compared and observed that the order of floral buds development of seven species solanaceae plants in this paper. It was same the developmental order of calyx, corolla and stamen of six species plants,their growing tip of floral buds formed in turn

Abstract:Floral neetary of Codonopsis pilosula Nannf were studied with light and electron microscopy. It belongs to disc-nectary and is composed of epidermis and necteriferous as well as vascular bundle. The surface of epidermis is covered with thick cuticle which

Abstract:Shingleave yellow hern (Xanthoceras sorbifolia Bge.) is a domestic oil-producting tree species in China. Yet it has been found that, during young fruit period, a premature drop is very serious and the rate of fruit setting is only 2.2-6.3%.The present pap

Abstract:The formation and development of protocorm in shoot-tip culture of Cymbidium grandifiorium have been examined by scanning electron microscopy. Most of protocorms originated from somatic embryos formed in explant and developed into cotyledon, leavies and r

Abstract:A. arborescens Mill var. natalensis Berg. has been analysed and identified containing components as following: turin, quercetin, kaempferol, anthraquinone,zeatin,giborellin,indole-3-acetic acid and abscic acid; 16 amino acids, 9 vitamines; soluble sucrose

Abstract:Six extracts of the root powder of Anemone hupehensis have been bioassayed against 6 species agricultural pest insects. The results indicated that 6 extracts had significant contact action to 3 species aphids and two-spotted spider mite, methanol extract

Abstract:The 44 chemical components of the leaves essential oils from Bang Gan Sour Orange (Citrus aurantium L.),Yi Da Li Sour Orange, Mo Luo Ge Sour Orange,Dai Dai Sour Orange,Xing Shan Sour Orange,and Gou Tou Sour Orange were identified by GC and GC-MS. Among th