Gymnosperm pollen grains from the La Veteada Formation (Lopingian), Paganzo Basin, Argentina: biostratigraphic and palaeoecological implicationspalynologyLate PermianpalaeoenvironmentspalaeoclimateGondwanaSouth AmericaThis work forms the concluding part of a series of systematic studies of typical Gondwanan ...
A new view of pollen embryogenesis is described which provides a model for a number of problems in plant development and has consequences for strategies of haploid production. The accumulated knowledge in the field of pollen plantlet formation is critically reviewed against this new view....
Pollen grains were stained with 1% po- tassium iodide. Scale bars, 50 µm. (C) Anther (top) and pollen (bottom) phenotypes of the backcrossed plants with ZS97B as the recurrent parent and wild rice accessions containing the pu- tative CMS genes as cytoplasm donors. The plants with ...
The development of Catananche caerulea pollen grains from the early free microspore stage to the formation of the male germ unit has been studied using the... BARNES SUSAN H.,BLACKMORE STEPHEN - 《Annals of Botany》 被引量: 24发表: 1988年 加载更多引用...
hypothesize that the ashfall at Kalinga were still hot when they deposited over the soil on which the butchered rhino carcass lay. These hot ashes would not only have burnt the landscape, they would also have destroyed the pollen grains, explaining their absence within presumably favourable redox...
Home > Section > Chapter Hada, M.; Tsurumi, S.; Suzuki, M.; Wellmann, E.; Hashimoto, T. Journal of Plant Physiology 148(1-2): 92-99 1996 ISSN/ISBN:0176-1617 10.1016/s0176-1617(96)80299-9 002879269 Article emailed within 0-6 h ...
Flower initiation marks the transition from vegetative to reproductive growth in seed plants. It is thus a crucial event in the life of these plants, particularly so because of the peculiar relation of vegetative and reproductive development in seed plan
1b–d). Under a light microscope, there were numerous normal-sized, black-stained pollen grains in wild-type anthers crushed in an I2–KI solution, but only anther residues were found in osabcg15 and no pollen (Fig. 1e). Fig. 1 Phenotype comparison between wild type and osabcg15....
A process for preparing the cis-racemate of 3-azabicyclo-(3.1.0)hexane-2-carboxylic acid, and certain novel intermediates involved therein.Gary ScholesFrank BaardmanUS4262124 * May 6, 1980 Apr 14, 1981 Shell Oil Company Bicyclic lactams and process for their preparation...
Gymnosperm pollen grains from the La Veteada Formation (Lopingian), Paganzo Basin, Argentina: biostratigraphic and palaeoecological implicationspalynologyLate PermianpalaeoenvironmentspalaeoclimateGondwanaSouth AmericaLooy et al. (1) present, for the first time, quantitative data for land plants during the...