Full TGIF Record # 189302
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DOI:10.1093/aob/mcr017
Web URL(s):https://academic.oup.com/aob/article/108/4/727/240116/Using-maize-as-a-model-to-study-pollen-tube-growth
    Last checked: 03/02/2017
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Dresselhaus, Thomas; Lausser, Andreas; Márton, Mihaela L.
Author Affiliation:Cell Biology and Plant Biochemistry, University of Regensburg, Regensburg, Germany
Title:Using maize as a model to study pollen tube growth and guidance, cross-incompatibility and sperm delivery in grasses
Section:Pollen-pistil interactions and self-incompatibility
Other records with the "Pollen-pistil interactions and self-incompatibility" Section
Source:Annals of Botany. Vol. 108, No. 4, September 2011, p. 727-737.
Publishing Information:London, Oxford University Press
# of Pages:11
Keywords:TIC Keywords: Cross-compatibility; Growth analysis; Interspecific hybridization; Models; Pollen tubes; Reproductive physiology; Self-compatibility; Zea mays
Abstract/Contents:"Background In contrast to animals and lower plants such as mosses and ferns, sperm cells of flowering plants (angiosperms) are immobile and require transportation to the female gametes via the vegetative pollen tube cell to achieve double fertilization. The path of the pollen tube towards the female gametophyte (embryo sac) has been intensively studied in many intra- and interspecific crossing experiments with the aim of increasing the gene pool of crop plants for greater yield, improved biotic and abiotic stress resistance, and for introducing new agronomic traits. Many attempts to hybridize different species or genotypes failed due to the difficulty for the pollen tubes in reaching the female gametophyte. Detailed studies showed that these processes are controlled by various self-incompatible (intraspecific) and cross-incompatible (interspecific) hybridization mechanisms. Scope Understanding the molecular mechanisms of crossing barriers is therefore of great interest in plant reproduction, evolution and breeding research. In particular, pre-zygotic hybridization barriers related to pollen tube germination, growth, guidance and sperm delivery, which are considered the major hybridization controls in nature and thus also contribute to species isolation and speciation, have been intensively investigated. Despite this general interest, surprisingly little is known about these processes in the most important agronomic plant family, the Gramineae, Poaceae or grasses. Small polymorphic proteins and their receptors, degradation of sterility locus proteins and general compounds such as calcium, γ-aminobutyric acid or nitric oxide have been shown to be involved in progamic pollen germination, adhesion, tube growth and guidance, as well as sperm release. Most advances have been made in the Brassicaceae, Papaveraceae, Linderniaceae and Solanaceae families including their well-understood self-incompatibility (SI) systems. Grass species evolved similar mechanisms to control the penetration and growth of self-pollen to promote intraspecific outcrossing and to prevent fertilization by alien sperm cells. However, in the Poaceae, the underlying molecular mechanisms are still largely unknown. Conclusions We propose to develop maize (Zea mays) as a model to investigate the above-described processes to understand the associated intra- and interspecific crossing barriers in grasses. Many genetic, cellular and biotechnological tools including the completion of a reference genome (inbred line B73) have been established in the last decade and many more maize inbred genomes are expected to be available soon. Moreover, a cellular marker line database as well as large transposon insertion collections and improved Agrobacterium transformation protocols are now available. Additionally, the processes described above are well studied at the morphological level and a number of mutants have been described already, awaiting disclosure of the relevant genes. The identification of the first key players in pollen tube growth, guidance and burst show maize to be an excellent grass model to investigate these processes in more detail. Here we provide an overview of our current understanding of these processes in Poaceae with a focus on maize, and also include relevant discoveries in eudicot model species."
Language:English
References:107
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dresselhaus, T., A. Lausser, and M. L. Márton. 2011. Using maize as a model to study pollen tube growth and guidance, cross-incompatibility and sperm delivery in grasses. Ann. Bot. 108(4):p. 727-737.
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DOI: 10.1093/aob/mcr017
Web URL(s):
https://academic.oup.com/aob/article/108/4/727/240116/Using-maize-as-a-model-to-study-pollen-tube-growth
    Last checked: 03/02/2017
    Access conditions: Item is within a limited-access website
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