Special Issue "Pollen Tube and Plant Reproduction"
Deadline for manuscript submissions: 30 September 2018
The pollen tube is a fundamental cell in the reproduction process of seed plants. The evolution of this cell has allowed plants to significantly reduce the need for water during the reproductive process, allowing them to conquer more lands. In its simplicity, the pollen tube exhibits several remarkable peculiarities, such as tip growth, a specifically organized cytoskeleton, a cell wall adapted to the growth mechanism and internal transport of sperm cells. Its biological importance and ease of analysis have made the pollen tube one of the most important cell models in plant biology. The importance of research on pollen tubes is always relevant, as demonstrated by the several articles published each year. The purpose of this Special Issue (which should report information or viewpoints of outstanding novelty) is to explore the key aspects of the mechanisms of functioning of the pollen tube in terms of reproductive success of plants. Self-incompatibility, regulation of pollen tube growth by female signals, negative effects of adverse environments on the growth process and therefore on reproduction are only a few of the research topics that are welcome in the special issue. The structure and function of other components of the pollen tube growth machinery, metabolism, genomics, biogenesis and senescence, reactive oxygen species and membrane transport are also of interest. Significant progress in pollen transformation is also welcome.Prof. Giampiero Cai
Prof. Stefano Del Duca
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- Cell wall
- Cell-cell communication
- Abiotic stress
- Cell morphogenesis
- Plant reproduction
- Plant metabolism
- Plant genetics
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Self-incompatibility of citrus: what should we do next step?
Author: Lijun Chai
Abstract: Citrus is one of the most important economic crops in the world. It possesses a significant reproductive characteristic, self-incompatibility (SI). Here, the focus is on the characterization of S-locus genes of SI. We emphasize recent studies of candidate genes and discuss the technical problems confronting us, including the long juvenile period and the much difficult genetic transformation in citrus. To overcome these problems, three further works will be carried out that the antisense oligonucleotide is utilized, an in vitro and an in vivo system (a Hongkong kumquat transgenic system) of SI are built.
Title: Physiological and Parental Effects on Pollen Performance in Clarkia Taxa with Contrasting Mating Systems
Author: Alisa A. Hove and Susan J. Mazer
Abstract: Studies of sexual selection in animals have revealed that male physiological condition is often positively correlated with mating success. Many studies of sexual selection in plants have examined the effects of pollen performance traits on fertilization success following gametophytic competition, as well as the effects of environmental conditions on the expression of these traits. The extent to which individual plant physiological status influences the expression of pollen performance traits, however, is not well understood. Here, we examine the relationships between ecophysiological performance and pollen performance, and we measured the effects of pollen donor and recipient identity on pollen performance. We assessed variation in gas exchange physiology and pollen performance in four taxa in the genus Clarkia: C. unguiculata, an outcrosser, and its selfing sister species, C. exilis, as well as the outcrosser C. xantiana ssp. xantiana and the selfer C. xantiana ssp. parviflora. We conducted a series of hand-pollinations in two populations per taxon in the southern Sierra Nevada Mountains, California. In each population, pollen from individual donor plants was applied to 2-16 receptive stigmas [(1-4 recipient flowers per plant x 3 maternal plants] + (1-3 self-pollinations)]. Pollinated styles were excised and fixed in formalin acetic acid 2.5 hours post-pollination. Germination success, mean pollen tube growth rate (PTGR), and the mean distance traversed as a proportion of total style length were estimated for each pollinated flower, controlling statistically for variation in air temperature at the time of pollination. We also measured each pollen donor’s instantaneous rates of photosynthesis, conductance, and transpiration, as well as instantaneous water use efficiency (WUEi). Phenotypic associations betweenphysiological traits and pollen performance traits were species-specific. In exilis, among all pollen donors, germination success was negatively correlated with stomatal conductance and transpiration rates. In unguiculata, among pollen donors, we observed significant non-linear effects of WUEi on both PTGR and the mean proportion of the style length traversed per hour. Rapid pollen tube growth (measured as PTGR and the mean proportion of the style length traversed per hour) was associated with both high and low WUEi. In C. x. ssp. parviflora, photosynthetic rates were positively correlated with germination success, PTGR, and the mean proportion of the style traversed among donors. In C. x. ssp. xantiana, we found no significant relationships between pollen performance traits and physiological traits. We did not observe significant differences among donors in pollen performance in any of the Clarkia taxa studied here. Pollen recipient identity, however, explained significant levels of variation in pollen performance in C. exilis and C. x. parviflora.
Keywords: mating system evolution; life history; sexual selection; pollen tube growth; pollen germination; maternal effect; gas exchange physiology