Tapetal death is essential for the provision of many molecules required for pollen
development including nutrients, proteins, lipids and polysaccharides. The molecules …

Functional pollen is needed to successfully complete fertilization. Pollen is formed inside the
anthers following a specific sequence of developmental stages, from microsporocyte …

Purine and pyrimidine nucleotides are major energy carriers, subunits of nucleic acids and
precursors for the synthesis of nucleotide cofactors such as NAD and SAM. Despite the …

Summary Callose (β‐1, 3‐glucan) is produced at different locations in response to biotic and
abiotic cues. Arabidopsis contains 12 genes encoding callose synthase (CalS). We …

Tapetal programmed cell death (PCD) is a prerequisite for pollen grain development in
angiosperms, and cysteine proteases are the most ubiquitous hydrolases involved in plant …

In Arabidopsis, the tapetum plays important roles in anther development by providing
enzymes for callose dissolution and materials for pollen‐wall formation, and by supplying …

A novel male‐sterile mutant of Arabidopsis thaliana was isolated by means of T‐DNA
tagging. Pollen abortion of the mutant was evident after microspore release, and pollen …

Guanylate kinase (GK) is a critical enzyme in guanine nucleotide metabolism pathways,
catalyzing the phosphorylation of (d) GMP to (d) GDP. Here we show that a novel gene …

Microsporogenesis in angiosperms takes places within the anther. Microspores are
surrounded by a layer of cells, the tapetum, which degenerates during the later stages of …

Abstract Adenosine (Ado) kinase (ADK; ATP: Ado 5′ phosphotransferase, EC 2.7. 1.20)
catalyzes the salvage synthesis of adenine monophosphate from Ado and ATP. In …