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Germination of Pistacia vera L. pollen in liquid medium
Springer Science and Business Media LLC - Tập 4 - Trang 182-187 - 1991
The osmotic effect of Polyethylene glycol (PEG) has been shown to be sufficient to induce the germination of Pistacia vera L. pollen in liquid medium. The prehydration of the pollen in a saturated atmosphere for approximately 10 h was necessary to obtain maximum in vitro germination. Imbibition of the pollen in water resulted in the rapid leakage of solutes into the medium. These solutes consisted...... hiện toàn bộ
Commonalities between pollen/stigma and host/pathogen interactions: calcium accumulation during stigmatic penetration by Brassica oleracea pollen tubes
Springer Science and Business Media LLC - Tập 12 - Trang 194-202 - 1999
Parallels have been explored between the early stages of stigmatic penetration by pollen tubes and the infection of epidermal cells by fungal pathogens. In a striking resemblence to events following the infection of Hordeum sp. by Erysiphe graminis, X-ray microanalysis has revealed the accumulation of calcium at the stigmatic surface following pollinations in Brassica oleracea. X-ray mapping stro...... hiện toàn bộ
In vitro culture of embryos of Cucumis spp.: heart-stage embryos have a higher ability of direct plant formation than advanced-stage embryos
Springer Science and Business Media LLC - Tập 3 - Trang 152-159 - 1990
The ability of embryos at different developmental stages to form plants in vitro has been studied in cultivated Cucumis sativus L. and in the wild species C. zeyheri 2 x Sond. and C. metuliferus Naud. On MS medium containing 3.5% sucrose, 0.1 mg 1−1 kinetin (Kn) and 0.01 mg 1−1 indoleacetic acid (IAA), proembryos (0.03–0.05 mm) and early globular embryos (0.05–0.08 mm) from the wild species develo...... hiện toàn bộ
Evidence on the nature and origins of endosperm dosage requirements in Solanum and other angiosperm genera
Springer Science and Business Media LLC - Tập 8 - Trang 189-196 - 1995
Success of seed development following sexual crosses is primarily dependent on proper endosperm function and development. The failure to produce triploids, or “triploid block” in 4x×2x crosses served as the impetus for numerous studies of embryo and endosperm to attempt to explain cross failure. Early explanations were based upon a concept of a 2∶3∶2 ploidy balance between maternal tissue, endospe...... hiện toàn bộ
Analysis of pollen-style interactions in Petunia hybrida; the determination of variance in male reproductive success
Springer Science and Business Media LLC - Tập 6 Số 4 - 1993
Cytochemical immunolocalization of the abundant pistil protein Sk2 in potato (Solanum tuberosum)
Springer Science and Business Media LLC - Tập 7 Số 3 - 1994
Ultrastructure and properties of the sexual agglutinins of the biflagellate green alga Chlamydomonas moewusii
Springer Science and Business Media LLC - Tập 2 - Trang 213-218 - 1989
The mt− agglutinins of the interfertile species Chlamydomonas moewusii and Chlamydomonas eugametos are very similar fibrous molecules. The mt− agglutinin of C. moewusii has the same Stokes radius (39 nm) and sedimentation coefficient (9.3 S) as its counterpart in C. eugametos; its length (336 nm) and its ultrastructure, including the position of four kinks are also the same as in C. eugametos. The...... hiện toàn bộ
Identification of genes showing differential expression between morphs in developing flowers of Primula vulgaris
Springer Science and Business Media LLC - Tập 19 - Trang 63-72 - 2006
Heteromorphic self-incompatibility systems provide an excellent model for studying both intraspecific breeding barriers and the regulation of floral organ size and positioning, yet at the molecular level, they are almost completely uncharacterized. In this study, a subtracted cDNA library was generated from developing and mature floral tissues of the thrum morph of Primula vulgaris, subtracted wit...... hiện toàn bộ
The intriguing complexity of parthenogenesis inheritance in Pilosella rubra (Asteraceae, Lactuceae)
Springer Science and Business Media LLC - Tập 25 - Trang 185-196 - 2012
Neither the genetic basis nor the inheritance of apomixis is fully understood in plants. The present study is focused on the inheritance of parthenogenesis, one of the basic elements of apomixis, in Pilosella (Asteraceae). A complex pattern of inheritance was recorded in the segregating F1 progeny recovered from reciprocal crosses between the facultatively apomictic hexaploid P. rubra and the sexu...... hiện toàn bộ
MEI1, an Arabidopsis gene required for male meiosis: isolation and characterization
Springer Science and Business Media LLC - Tập 11 - Trang 199-207 - 1998
The T-DNA tagged mutant gene of Arabidopsis thaliana, mei1, produces after meiosis an abnormal tetrad, consisting of five to eight microspores of varying sizes and DNA contents. Plant DNA flanking the inserted T-DNA was isolated by inverse PCR. An approximately 16-kb DNA fragment spanning the T-DNA insertion site was isolated by screening a wild-type genomic library, using the plant flanking DNA ...... hiện toàn bộ
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