Abstract:The activities and compositions of esterase and peroxidase isoenzyme and all soluable proteins during different pollen development stages have been investigated withultrathin-polyacrylamide gel electrophoresis in Gossypium hirsutum. The results show:There

Abstract:黑脉羊肚菌子囊孢子绝大多数（９２．８％）呈椭圆形，少数（７．２％）为圆形。细胞核的数目不等，多数单核，少数为双核。细胞质的密度以及细胞核的形状和在也子内的定位一的差别。萌发初期，孢子因吸水体积膨胀，多数孢子的核不发生分裂，直接转移到孢子的一极，细胞核所在位置的壁向外凸出形成芽管，细胞核也随之进入到芽管，位于或靠近芽管的顶端。

Abstract:利用扫描是镜和光地七筋姑属北美全部４种和东亚１种１１个居群的叶表皮形态进行了观察。其总体特征如下；上表皮细胞５－７边形、近等径或狭长，下表皮细胞长条形；垂周壁向外隆起，平直，有明显加厚或加厚不明显，平周壁内陷，平滑具浅坑，有时具细条纹状纹饰或细小突起。气孔器散生于下表皮，均为无规则型，长度约为表皮细胞的１／４－１／３，隆起于表皮细胞或有时稍下陷。北美４种中，Ｃ．ｕｎｉｆｌｏｒａ下表皮生有长的扁平状

Abstract:Observation and analysis of the structure of buckwheat (Fagopyrum ) kerneldemonstrated that separation between seed cover and fruit cover is easy, "S" type embryo bud located on the center of seed,seminal root and aleurone layer cells are the mainarea in

Abstract:Studies have indicated that Peganum possesses very striking xeromorphic structures,for example,roots possesses developed periderm,more than 2 rings of anomalousvascular bundles exsite in axis organs,with crystal cells and water storage tissues,theleaves b

Abstract:The ultrastructural observations on the development of microspore and malegametophyte in Nitraria sibirica was reported in this paper. The conclusions is,at sporogenous cell stage,endothecial cell sparated by the wall ingrowth from band thicking on radial

Abstract:The effects of S-07 on the growth of seedings got from immature wheat embryo culture were investaged. The results showed that (1) low concentration S-07 (2.5- 5.0mg/L S-07, 2 % surcrose in 1/2 MS medium) could inhance the growth of immature embryo seedlin

Abstract:7 Different wheat varieties were used,the lensin of coleoptile was measured,the results indicated that the length of coleoptile in drought-resistant genotypes was longerthan that of disdrought resistant ones,and the difference was very significant. The re

Abstract:Some relatively stable alien addition line, alien substitution line and translocationline were obtained by the means of formation and cytology indentifyng and directed selecting the backcross progenies,Which were backcrossed intergenous F1 hybrids between

Abstract:通过测定银杏净光合速率、蒸腾速度、气孔阻力等生理指标和观测银杏叶片形态、解剖特征，结果表明：１．银杏光补偿点为７６μｍｏｌ．ｍ＾－１．ｓ＾－１，光饱和点为１０４０μｍｏｌ．ｍ＾－２．ｓ＾－１。超过光饱和点后，随光照强度增加光合强度反而下降。２．银杏光合最佳温度为２６℃。３．净光 速率的日变化呈“午休”型的双峰曲线变化，最高峰出现在１０：００Ａ．Ｍ．前后，次峰出现在６：００Ｐ．Ｍ．前后。４．蒸腾速度

Abstract:Saposhnikovia divaricata (Turcz. ) Schischk.is a perennial herb and has a tap rootsystem. In lateral root,there is same structure with the main root,their primary xylem isdiarch. In main root,the number of oil canal was increased with the age adding,it is

Abstract:The injury of sulfur dioxide to table grapes was gradual and the injury state of tissues was related to their structures and the sensitivities to sulfur dioxide. The injury action started with cell membrane system. Through the histological anatomy, the re

Abstract:There are three main vegetation types in the studyed area, they are warm steppe,alpine shrub and alpine meadow. The warm steppe is distributed mainly on the east partof the shore;the alpine shrub is distributed between 3400- 3700 m above sea level;andthe

Abstract:The pollen grains of nine plants from two localities of Helianthemum songaricumwere investigated throught the use of a scanning electron microscope,and apparant correlativity between the intraspecific variations of pollen morphology and their geographical

Abstract:从新鲜芒果中提取酶液，进行过氧化物酶活性的测定，结果表明：芒果酶提取液中过氧化物酶最适ＰＨ值为４．７５，米氏常数Ｋｍ值为３．２３×１０＾－３ｍｍｏｌＨ２Ｏ２／ｍＬ最大反应速度Ｖｍａｘ＝０．２４４Ｏ．Ｄ／ｍｉｎ。在７５℃下加热处理２０ｍｉｎ或８０℃下处理５ｍｉｎ，可使过氧化物酶完全失活。

Abstract:This paper deals with the effect of Hg2+ on wheat seed vigour, seedlings growth,respiration rate and activities of aminotransferase, diastase and' lipase during germina-tion. The results showed that Hg'+ could inhibit activities of aminotransferase,diasta

Abstract:The germination rate and vigor index of Pinus tabulaeformis Carr. seeds raised obviously after treated 10 min with 500 kV direct current fields,which compared with control ones are 123. 2% and 161.1% for soaked seeds, 124. 9% and 132. 6% for dry seedsTest

Abstract:In this paper,chromosome numbers are reported for eight species of Gentiana fromthe alpine mountains of the western China. Among them,Gentiana ampla H. Smith has achromosome number of 2n = 48,G. stipitata Edgew. subsp. tizuensis (Franch.) T. N. Hohas a ch

Abstract:It was observed that the ultrastructure of chloroplast of Polygonum aviculare andPlantago asiatica grown on different altitude of Qinghai-Tibet plateau- Showed that: 1.The chloroplasts of Polygonum aviculare grown on high altitude changed in shape andfor

Abstract:RNase activity was significantly enhanced among alien disomic addition lines of Agropyron elongatum-Chinese Spring under phosphorus deficiency stress. IEF of RNaseshowed that only extremely faint bands were observed on +P (CK) condition,in contrast with t

Abstract:This paper presented here is in vitro plant regeneration derived from explants of O.ochrocephala,O. kansuensis and O. latibracteata. Concentration ratio of NH/No is oneof facts controlling browning, and has significant effects on regeneration. Exprimenta

Abstract:The seed and plant morphological characters,gland expression,gossypol contents,and peroxide isoenzymes of the 5 wild species of Gossypium in Australia were studied inthis paper. The results shown that the morphological characters of seed,plant and flower

Abstract:Under 200 mmol/L NaCl for 6 days,the activity of proteolytic enzymes in the rootof barley seedlings decreased. The content of soluble protein decreased during the former4 days,but sllghtly increased on the 6th day. On the 1st, 2nd and 6th day,the amounts

Abstract:Histology and endocytokinin content of kiwifruit by treatment of CPPU were studied. The results showed that cell division period of fruit was prolonged,cell unmber wasincreased,cell volume was enlarged,after the fruits were treated with CPPU. In pulp cell

Abstract:对甘肃河西走产野生豆科植物结瘤及固氮状况进行了调查。栽培豆科植物均能自然结瘤，野生豆科植物结瘤率仅５０％。该地区豆科植物根瘤大多数圆形、棒状或指状，形状较为规则。栽培植物根瘤多为粉红色，而野生揿为白色、黄色或棕色。ＡＲＡ测定表明，２５．６％根瘤为无效根瘤。不同种不同地区根瘤固氮活性相差较大，一般活力都较低，乙炔还原活性小１μｍｏｌＣ２Ｈ４／ｇＦＷ．ｈ的占检测样品数的２９．９％，最高者信为２８．１９