Nova Publishers
My Account Nova Publishers Shopping Cart
HomeBooksSeriesJournalsReference CollectionseBooksInformationSalesImprintsFor Authors
            
  Top » Catalog » Books » Environment » Pollen: Structure, Types and Effects Chapters » My Account  |  Cart Contents  |  Checkout   
Quick Find
  
Use keywords to find the product you are looking for.
Advanced Search
What's New? more
Doxycycline: Medical Uses and Effects
$73.80
Shopping Cart more
0 items
Information
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us
Notifications more
NotificationsNotify me of updates to THE ROLE OF ANION CHANNELS IN POLLEN GERMINATION AND TUBE GROWTH pp. 235-253
Tell A Friend
 
Tell someone you know about this product.
THE ROLE OF ANION CHANNELS IN POLLEN GERMINATION AND TUBE GROWTH pp. 235-253 $100.00
Authors:  (Maria Breygina, Department of Plant Physiology, Biological Faculty, Lomonosov Moscow State University, Moscow, Russia)
Abstract:
Germinating pollen grain provides the formation and delivery of the sperm cells to the ovule, and therefore plays a central role in sexual plant reproduction. Moreover, it is relatively simply organized, and became a widely used model in studies of plant physiology, including those of morphogenesis regulation and polar growth.
An important feature of male gametophyte is a capability for polar growth based on structural and functional cytoplasm compartmentalization. Numerous studies demonstrated common mechanisms controlling the apical growth of pollen tubes, root hairs, fern rhizoids, fungal hyphae and axons of neurons (Geitmann, Emons, 2000; Palanivelu, Preuss, 2000; Bushart, Roux, 2007).
The pivotal role in polar growth organization is played by inorganic ions (Hepler et al., 2006). Heterogeneous distribution of ion fluxes, intracellular ion gradients and their connection with morphogenesis has been shown for different cells, including growing fungal hyphae, frog and fish oocytes, drosophila and brown algae eggs (Nuccitelli, 1988). As early as in 1975 it was shown using nonselective microelectrodes that lily pollen grain activation leads to the appearance of transmembrane ion currents (Weisenseel et al., 1975). The inward current reached maximal values in the place of the would-be germination, while the outward current on the opposite pole. After germination the inward currents were distributed along the tube, while the outward currents were shifted towards the pollen grain. According to these authors (Weisenseel, Wenisch, 1980), membrane potential values of the vegetative cell of lily pollen grain varied from -90 to -130 mV. In the later studies similar results (from -110 to -150 mV) were obtained for lily pollen using improved microelectrode methods (Obermeyer, Blatt, 1995). For pollen grains of other plant species, more positive membrane potential values have been reported: -30 mV in Petunia hybrida and -37 mV in Narcissus (Feijo et al., 1995), while potential of isolated pollen protoplasts of Brassica chinensis was -79 mV (Fan et al., 2003). Pollen tube membrane potential also varied in different plant species: e.g., in Agapanthus umbellatus it amounted to -55 mV (Malho et al., 1995), whereas in Arabidopsis around -100 mV (Mouline et al., 2001). 


Available Options:
Version:
This Item Is Currently Unavailable.
Special Focus Titles
01.Violent Communication and Bullying in Early Childhood Education
02.Cultural Considerations in Intervention with Women and Children Exposed to Intimate Partner Violence
03.Chronic Disease and Disability: The Pediatric Lung
04.Fruit and Vegetable Consumption and Health: New Research
05.Fire and the Sword: Understanding the Impact and Challenge of Organized Islamism. Volume 2

Nova Science Publishers
© Copyright 2004 - 2021

THE ROLE OF ANION CHANNELS IN POLLEN GERMINATION AND TUBE GROWTH pp. 235-253