Pollen tubes
Nitric oxide is involved in growth regulation and re orientation of pollen tubes
... of pollen tube, but is present at higher levels behind the tip, where the presumed NO- generating peroxisomes are ...for pollen tube growth at the tip and may, in the absence of an exogenous NO source, act ...
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Perturbation Analysis of Calcium, Alkalinity and Secretion during Growth of Lily Pollen Tubes
... Abstract: Pollen tubes grow by spatially and temporally regulated expansion of new material secreted into the cell wall at the tip of the ...Wallace) pollen tubes showed that an increase in ...
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Chloride fluxes in lily pollen tubes: a critical reevaluation
... tobacco pollen tubes and steady Cl ) influx along the shaft immediately behind the ...tobacco pollen were in phase with growth oscillations, thus identifying Cl ) efflux as the first oscillating ...
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Investigations of suitable pollinator for 0900 Ziraat sweet cherry cv : pollen performance tests, germination tests, germination procedures, in vitro and in vivo pollinations
... cherries. Pollen grains are simple structured plant cells. Pollen tube formation is a good, simple model of growth and development (Taylor, Hepler ...Thus, pollen germination and growth of ...
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Arabidopsis HAP2 (GCS1) is a sperm specific gene required for pollen tube guidance and fertilization
... hap2-1 pollen tubes reach ovules, enter the micropyle and burst, releasing GUS activity and two sperm into the degenerating synergid ...hap2-2 pollen is used to pollinate a wild-type ...hap2-1 ...
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Cytoplasmic Ca2+ changes dynamically during the interaction of the pollen tube with synergid cells
... the pollen grain and pollen tube, but also in the synergid cells, and to a lesser degree the central cell of the embryo sac and the sporophytic tissues of the ovule (supplementary material ...
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Organogermanium (Ge 132) Suppresses Activities of Stress Enzymes Responsible for Active Oxygen Species in Monkey Liver Preparation
... crystallography [9]. Ge-132 is a water-soluble compound and its safety has been confirmed [10]. The structure of Ge-132 and its hydrolyzed monomer, 3-(trihy- droxygermyl)propanoic acid (THGP), are displayed in Figure 1 ...
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Invasive cells in animals and plants: searching for LECA machineries in later eukaryotic life
... Invasive cell growth and migration is usually considered a specifically metazoan phenomenon. However, common features and mechanisms of cytoskeletal rearrangements, membrane trafficking and signalling processes ...
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Sex in the Salicaceæ: and its Modification by Eriophyid Mites and other Influences
... Heslop Harrison Thus, to sum up, many factors contributing to the excess of females in the polyploid Salices may be at work: i a differential growth in pollen tubes favouring certain gam[r] ...
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Floral biology and pollination of solanum sisymbrifolium lamk
... that pollen presentation time starts. Flower and pollen anthesis may depend upon physical, physiological and biochemical factors of a plant as well as on climate ...collecting pollen from the ...
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In vitro Studies on Pollen Viability, Pollen Germination and Pollen Tube Growth of Hornstedtia conoidea Ridl. – a Philippine Endemic Ginger Species
... and pollen tube growth Pollen viability can be assessed through in vitro ...germination. Pollen of some species can ger- minate in water [48], while other species require more complex media for ...
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STUDIES ON SELF-STERILITY. VIII. SELF-STERILITY ALLELOMORPHS
... The difference between self-fertile plants and self-sterile plants de- pends upon rapidity of pollen-tube growth, and the speed a t which pollen tubes bearing particular [r] ...
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Disruption of the pollen expressed FERONIA homologs ANXUR1 and ANXUR2 triggers pollen tube discharge
... When pollen tubes reach the female gametophyte, they arrest growth, burst and discharge their sperm ...of pollen tube discharge as anx1 anx2 double- mutant pollen tubes cease their ...
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POLLEN MORPHOLOGY, VIABILITY, GERMINATION AND TUBE GROWTH OF SOME PLANT SPECIES
... of pollen tubes in coniferous ...angiosperm pollen tubes, coniferous pollen tubes grow slowly and do not form callose plugs that they differ in wall deposition and ...of ...
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POLLEN-TUBE GROWTH IN CROSSES BETWEEN BALANCED CHROMOSOMAL TYPES OF DATURA STRAMONIUM
... The ungerminated portion of the pollen remaining on the stigma is 39 percent and the grouping and distribution of the normal pollen tubes is rather spread and not entirely[r] ...
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ON ELONGATION OF REGAL LILY (LILIUM REGAL.Q) POLLEN TUBE H.K.
... Thus, combined use of IAA+GA which produced longer pollen tubes than did either of them alone in distilled water set, produced shorter pollen tubes than the la tter in pr[r] ...
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The history of the vegetation and climate in southern Tasmania since the late Pleistocene (ca 13 000 0 BP
... TO enable as objective an interpretation as possible of this fossil pollen data, the present-day pollen rains across Tasmania were studied via surface sampling and pollen trapping progra[r] ...
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GENETIC CONSEQUENCES OF THE COUPLET CYTOPLASMIC POLLEN STERILITY AND POLLEN MIGRATION
... The dynamics of population change under these conditions are influenced by the cytoplasmic composition of the recipient population.-Although genetic diversification b[r] ...
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FERTILIZATION ABILITY OF MAIZE POLLEN GRAINS. I. POLLEN SOURCES
... Since Ky49xKy27 was not only the female parent but also the source of y pollen used in each combina- tion with each yellow single cross on each date, the percentage of white k[r] ...
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Impacts of climate and humans on the vegetation in northwestern Turkey: palynological insights from Lake Iznik since the Last Glacial
... Iznik’s pollen record starts at ...in pollen diagrams (van Zeist et ...lata pollen type may point to area disturbance or grazing (van Zeist et ...type pollen, which probably originated from ...
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