Photosynthate Unloading from Seed Coats of Phaseolus vulgaris L. an Attempt to Define Conditions Required for Stimulation by Abscisic Acid and Benzylamino Purine     

John W.PATRICK 《浙江大学学报(农业与生命科学版)》1990,(4)

The instablity of the stimulation of photosynthate unloading from seed coats of Phaseolus vulgaris by abscisic acid (ABA ) and benzylamino purine ( BAP ) was studied in terms of experimental conditions. ABA stimulated photosynthate unloading at pH 6 and pH 8 without close dependence upon pH. ABA at a concentration range of 10-5-10-4 mol/L displayed stimulatory effect. However, BAP revealed no effect at a concentration range of 10-6-10-4 mol/L. Experiments designed with different transport time of 14C-photosynthate indicated that ABA might act at the plasma membrane of the unloading cells. Reducing endogenous ABA level by diminishing leaf area did not facilitate the manifestation of exogenous ABA function. Potassium ion stimulated photosynthate unloading from seed coats with highest promotion at 100 mmol/L K . However, no dependence of ABA stimulation of photosynthate unloading on K was found.  相似文献   

夏直播花生规范化栽培密度与氮肥优化配置研究   总被引：1，自引：0，他引：1  

李伟锋  张保亮  何延成  王海红  张梅 《花生学报》2004,33(3):37-40

采用二次饱和D—最优设计建立了密度和N肥用量与夏直播花生产量的数学模型。进一步分析表明，密度与N肥用量呈负交互效应，肥料用量增加，花生密度可适当减少。密度与N肥用量的最优组合为每公顷播15．36万穴，施纯N99．6kg，最高产量可达到5527．0kg。公顷产量在4500~5527kg范围内的措施组合为：每公顷播15．O～18．7万穴，施纯N65．1～124．4kg。  相似文献   

光棘豆单细胞培养再生植株   总被引：1，自引：0，他引：1  

张相岐  王献平 《草业学报》1993,2(4):26-30

由光棘豆种子无菌苗的胚轴和子叶诱导的愈伤组织建立起细胞悬浮系。由悬浮系分离出单细胞。单细胞在含有1～2mg/L 2,4—D的2/3MS培养基中采用振荡和静止两种方法培养。结果表明。振荡培养愈伤组织再生频率较高,所需时间较短。单细胞再生的愈伤组织转入分化培养基后分化出芽。幼苗转入含有IBA和IAA的1/2MS培养基中生根,成为完整的再生植株。在分化培养基中,只有瘤状愈伤组织能够分化出芽。并且较高浓度的细胞分裂素(6—BA或KT)或6—BA与ZT结合使用对愈伤组织的分化是有利的。  相似文献   

黑龙江省植物物种及其保护概况     

孙振国  刘玉梅 《林业勘查设计》2006,(3):69-71

黑龙江省共有三个植物区,植物区系成分比较复杂,有多种多样的生态系统,植物物种非常丰富。目前,黑龙江省共有维管束植物185科92属2503种,种类较多的科依次是:菊科(Compositae)、禾本科(Gramineae)、莎草科(Cyperaceae)、蔷薇科(Rosaceae)等。但由于生境的破坏,我们黑龙江省每年都有一定数量的植物灭绝或处于灭绝的边缘,这要求我们对它们加以保护,主要方法有:就地保护、迁地保护等,不但对物种进行保护,更重要的是保护其生态系统。  相似文献   

In vitro Plant Regeneration from the Mature Tissue of Navel Orange (Citrus sinensis L. Osbeck) by Direct Organogenesis     

HUANG Jia-quan  YIN Li-yan  YANG Xiao-hong  SUN Zhong-hai 《中国农业科学(英文版)》2005,4(3)

An efficient in vitro regeneration system by direct organogenesis from mature nodal and internodal stem segments of Newhall navel orange (Citrus sinensis L. Osbeck) was developed. Illuminating conditions together with plant growth regulators affected the adventitious bud regeneration frequency and efficiency. The initial 15 d darkness inoculation is beneficial for the adventitious bud regeneration. The highest regeneration frequency (85.2%) and bud formation efficiency (3.7 per responsive internodal stem segment) were obtained in the media supplemented with 1.0 mg L-1 BAP and 0.5 mg L-1 NAA. ABA at 0.2 mg L-1 positively affected the bud formation efficiency, which amounted to 8.5 buds per internodal segment in the presence of BAP at 1.0 mg L-1. The adventitious shoots successfully rooted and were transferred to the soil.  相似文献   

Dynamics of the Cumulation of Macroelements – Phosphorus, Potassium, Calcium and Magnesium During Development to Maturity of Soybean Seed     

V. Slip&#;evi&#;    I. Vedrina-Dragojevi&#;  L. Balint  J. Momirovi&#;-&#;uljat 《Journal of Agronomy and Crop Science》1992,168(2):73-84

Dynamics of the cumulation of phosphorus, potassium, calcium and magnesium in developing seed of four soybean genotypes under the defined climatic conditions in the course of three years was observed. Samples were being taken at weekly intervals from the point at which the grain reached a size suitable to be analyzed up to the full maturity of the seed. By analyzing the results it was found out that the intense cumulation of the minerals tested took place during the stages III and IV of the seed development, that is, in the course of intense cumulation of dry matter and the most expressive metabolic activity in the seed. Investigation of the impact of climatic conditions provides evidence that cumulation of the tested macroelements has been favourably influenced by increased precipitation along with moderate air temperatures within the seed developing period. The highest content of the minerals found with the cultivar Maksimirka independently of the year investigated reveals that mineral cumulation in soybean seed is affected by the cultivar and genetic particularity.  相似文献   

烟草黑胫病菌(Phytophthora parasitica var. nicotianae)生理小种鉴定技术研究   总被引：1，自引：0，他引：1  

谢成颂  王智发  刘延荣  张广民 《山东农业大学学报(自然科学版)》1989,(1)

在1980-1986年,对烟草黑胫病菌生理小种鉴定技术和方法进行了研究和探讨。结果表明,Nicotiana ncsophil(?),Burley21;Burley37;N.stocktonii是理想的鉴别寄主:整株接种方法优于其他的接种方法;接种物浓度以控制在相同的水平(10~3 ml)为宜。为减小生物测定的差异,所有菌系应一次完成测定。  相似文献   

杉木第二代种子园子代测定效果分析     

赵剑斌  何祯祥 《西部林业科学》1996,(4)

本文对福建省官庄林场杉木第二代种子园自由授粉子代试验林树高、胸径和材积等生长性状进行了研究。子代测定结果表明，参试家系间的效应显著；利用方差分析的结果，估算了杉木树高、胸径和材积的家系遗传力和单株遗传力，并以１０％、２０％的选择强度估算出杉木的遗传增益值。通过分析得出杉木各生长性状间有较高的相关性。依材积选择出４６个优良家系，用作造林，４年生时估计其遗传增益可达４１．３７％～５１．３７％。  相似文献   

Influence of the Indoleacetic Acid-Lysine Synthetase Gene (iaaL) of Pseudomonas syringae subsp. savastanoi on Yield Attributes of Potatoes     

M. Fladung 《Plant Breeding》1993,111(3):242-245

The iaaL gene of Pseudomonas syringae subsp. savastanoi encodes an indoleacetic acid-lysine synthetase which conjugates free indoleacetic acid (IAA) with lysine. lAA-lys is biologically less active than free IAA. The iaaL coding region was expressed under the control of the cauliflower mosaic virus 35S promoter and transgenic potato plants were produced (Spena et al. 1991). 35S iaaL potato plants are characterized by increased internodal length and epinastic bending of older leaves. In three greenhouse experiments with plants grown in pots of different size and in two growth chamber experiments tuber number increased in iaaL transgenic plants compared to untransformed and vector-transformed controls of the same genotype. The increase in tuber numbers observed under controlled conditions was reflected in tuber yield which increased in the pot grown transgenics.  相似文献   

植物活体水分探测仪的研制及测试初报     

贡小虎  张国桢 《甘肃农业大学学报》1993,28(4):391-394

利用NIM插件探测器及金硅面垒探头组装了植物活体水分探测仪;筛选并分析了仪器的最佳工作条件;检测了春小麦、玉米、苜蓿、豌豆、红豆草叶片鲜重的变化。结果表明;叶片水分随时间损失大的,其抗旱性差。叶片保水的秩序为:红豆草、豌豆>苜蓿>春小麦>玉米。  相似文献