Programmed Cell Death and Microspore Embryogenesis
Programmed cell death (PCD) occurs in the anther during in vivo micro-spore/pollen development. The first hallmarks are detected in the tapetum at meiosis and consist in progressive degeneration of organelles such as mitochondria, as well as DNA degradation into multiple of 180 kpb fragments. This phenomenon radially extends in the anther sporophytic tissues and finally affects microspore/pollen at various stages of development depending upon species. PCD may infer with the process of microspore embryogenesis. Indeed, the inducing pre-treatment is per formed using the whole anther during the process of microspore vacuolation. Thus the stress of pre-treatment may influence the triggering of PCD in both the anther tissues and the microspores and is likely involved in the competence of microspore to the process of microspore embryogenesis. These data are also discussed consid ering the regeneration of albino microspore derived plants in cereals.
Unable to display preview. Download preview PDF.
- Ishiguro S, Kawai-Oda A, Ueda J, Nishida I, Okada K (2001) The DEFECTIVE IN ANTHER DEHISCENCE1 gene encodes a novel phospholipase A1 catalyzing the initial step of jasmonic acid biosynthesis, which synchronizes pollen maturation, anther dehiscence, and flower open ing in Arabidopsis. Plant Cell 13:2191–2209PubMedCrossRefGoogle Scholar
- Joosen R, Cordewener E, Supena EDJ, Vorst O, Lammers M, Maliepaard C, Zeilmaker T, Miki B, America T, Custers J, Boutilier K (2007) Combined transcriptome and proteome analysis identifies pathways and markers associated with the establishment of rapeseed microspore-derived embryo development. Plant Physiol 144:155–172PubMedCrossRefGoogle Scholar
- Wang M, van Bergen S, Lamers GEM, Oppedjik BJ, Schilperroort RA (1999b) Programmed cell death during androgenesis in Hordeum vulgare L. In: Clément C, Pacini E, Audran JC (eds) Anther and pollen: from biology to biotechnology. Springer Berlin/Heidelberg/Tokyo, pp 201–209Google Scholar
- Wu HM, Cheung AY (2000) Programmed cell death in plant reproduction. Development 44:267–281Google Scholar