Fig. 3 shows a schematic cross section of a sporoderm and the surface view of a tectum, using in part the terminology proposed by E rdtman (1952).doi:10.1007/978-3-7091-8602-2_13Brigitte BuchenA. SieversSpringer ViennaBuchen, B. & Sievers, A. 1981 Sporogenesis and pollen grain ...
International Journal of BotanyBüyükkartal HNB, Colgeçen HT (2007) The reasons of sterility during pollen grain formation in the natural tetraploid Trifolium pratense L. Int J Bot 3:188–195Bu¨yu¨kkartal HNB, Colgec¸en HT (2007) The reasons of sterility during pollen grain formation...
aseptations 分隔 [translate] a充抵 充抵 [translate] aidentify 辨认 [translate] aThank you for your email Kevin and for your quotation. 谢谢您的电子邮件凯文和您的引文。 [translate] aformation of inclusions restraining the grain growth by 克制晶粒生长的包括的形成 [translate] ...
In vitro Arabidopsis pollen germination and characterization of the inward potassium currents in Arabidopsis pollen grain protoplasts. J Exp Bot 2001; 52:1603–1614. Article CAS Google Scholar Chen L, Wang F, Wang X, Liu Y-G . Robust one-tube Ω-PCR strategy accelerates precise sequence ...
The pollen analysis showed that there was small amount of pollen in the Q1 alluvial-pluvial layer, in which xerophytes, such as Chenopodiaceae, Gramineae, Ephedra and Artemisia, etc. (Table 1) were dominant plants. The sediment in the strata Q1 and the assemblage characteristics of pollen ...
Sporopollenin of pollen grains is sensitive to oxidation. Therefore, pollen grains are best preserved in redoxic environments, meaning waterlogged and anaerobic sediments such as clays, especially when acidic. Yet, although these conditions seem to have been present in Unit F, pollen grains were ab...
The exine also forms patterns, such as dramatic spikes, or the relatively tame reticulated surface of the Arabidopsis pollen grain (see figure); intriguingly, self-assembly based on the properties of colloids has been proposed as a mechanism for forming these patterns. 展开 DOI: 10.2307/23327509...
nov. (Pl. I, fig. 24) Diagnosis: Disaccate pollen grain with a total length of 40-42 μm. Amb rhombic; corpus 11-12×17 μm in size. A long and thin laesura near the central part of the proximal surface. Sacci much larger than corpus, 21-25×24-28 μm In size, with tiny...
the influence of water depth is very little.Sand transportation is the material condition for the dune development in the continental shelf,especially in fine and medium sand seafloor areas.Within such grain size areas,the dune size is in weak positive correlation with the grain size.Gentle and ...
Scanning electron microscopy of pollen grain of wild-type (g) and tek (n) showed the similar reticulate pattern. Scale bars, 5 μm. (o) AtUSP had its similar expression pattern in wild-type and tek anthers. Scale bars, 20 μm. (p) Cytochemical staining of semi-thin sections of...