Abstract:在组织培养条件下,用甜椒小孢子单核期的花药进行培养,研究低浓度铁氰化钾(0.1—1μg g~(-1))对甜椒花药化学杀雄的可能机理。通过ATP酶的组织化学染色及扫描电镜研究,本药剂对甜椒化学杀雄的作用可能与抑制绒毡层细胞中的ATP酶活性有关,因而抑制花药壁的形成。

Abstract:The paper reports types of water stress adaptation of two rapese ed. The result showed that Brassica napus L.adaptation to water stress is less than that of B.juncea L., the main reason is due to its moiphologic structure related to drought, including wel

Abstract:Polyembryonic rice is an important material for apomixis research. It was found that there were various types of embryo and seedling in four varieties with the observation on the embryoes and seedlings of polyembryonic rices. Shuang-13 is the richest one

Abstract:利用从兰单体自交分离得到的5个自花结实的4D缺体小麦(映72180、块天选15等)作母本与11个山羊草(Ae.speltoides, Ae.sharonensis等)杂交,再以4D缺体为轮回亲本对杂种进行回交,借助于幼胚培养技术,获得了缺天选15×拟斯卑尔脱山羊草二体异代换系,缺72180×沙融山羊草单体异代换系。代换系生长发育良好,育性基本正常,表明山羊草的4S染色体能够补偿小麦缺失的4D染色体的功能。证明利用“缺体回交法”选育普通小麦—山羊草异代换系是有效的和可行的。

Abstract:The histology of somatic embryogenesis of Panicum miliaceum in vitro is described here. The mature embryos produced embryogenic callus and the callus regenerated plants. The results of histological observation indicated that (1)callus was first formed fro

Abstract:Methods for plant regeneration in tissue culture of G.aurantiaca were described. When various explants of G.aurantiaca including leaf, petiole or stem segment were respectively cultured on six kinds of differentiation medium, morphogenetic calli were hard

Abstract:During development of megagametophyte in wheat(Triticum aestivum L.), the nucellar cells adjacent to the embryo sac degenerated and showed high ACPase activity, especially at the chalazal end. High activity of ACPase was observed in the multiple concentri

Abstract:通过大田及盆栽实验,初步探讨了植株水分状况对大豆叶取向运动的影响。大豆末端小叶在木质部水势约为-9.1×10~5Pa时,开始呈直立状态,且大水势下降到-14.4×10~5Pa时开始发生倒位现象。随着水分胁迫加剧(超过两个临界值),大比例的末端小叶发生上述两种现象。中午木质部水势与叶片角有显著相关性。实质上,水分胁迫有诱导并加剧避日性叶取向的作用。干旱植株在复水后不到2个小时,其叶取向便可逆转。大豆叶片避日性取向通过降低接收辐射可防止叶温升高和木质部水势的下降.高度避日态并不影响叶片净光合率。

Abstract:The pot experiment was conducted in order to study the growth, development, physiological characters and grain yield potentiality in octaploid of Panicum miliaceum L.. Results indicated that there are evident differences between octaploid and tetraploid i

Abstract:大柴旦盆地属于茺漠植被区域。在盆地中,从洪积平原到湖积平原依次发育着矮半灌木、灌木砾漠,矮半灌木沙漠,禾草、杂类草盐生草甸,芦苇(Phragmites communis)盐沼泽。周围山地自低而高依次发育着矮半灌木,灌木低山石漠,小叶金露梅(Dasiphora parvifolia)亚高山灌丛,紫花针茅(Stipa purpurea)高寒草原和矮嵩草(Kobresia humilis)高寒草甸,高山稀疏植被。由于地形封闭,这里残存了在柴达木盆地其它地区已消失的一些植被类型,有些植物种远离其主分布区达500km以上。盆地海拔基准高达海拔3500m,加上山地的屏蔽作用向上逐渐减弱,致使气温的垂直递减率较大,在垂直带谱中缺失山地草原和针叶林等中山带植被。此外,盆地中湖积平原富积硼酸盐,使盐生草甸中的优势种之一盐角草(Salicornia herbacea)发生变态,这是本区植被中出现的一个有重要科学意义的指示植物现象。

Abstract:Lamium amplexicaual L. (Labiatae) possesses two types of flowers on the same plant: self-compatible (short-tubed, closed, weakly pigmented and self-polliuating) cleistogamic flowers and self-incompatible (long-tubed, open, showy,and insect-pollinated) cha

Abstract:The archesporial cell of microsporangium in watermelon appeared in 4-6 days after the male flower primordia came out, it is supposed that the number of archesporial to be only one row. Primary sporogenous cells divided for 2-3 times and formed secondary s