Differential display proteomic analysis ofPicea meyeripollen germination and pollen-tube growth after inhibition of actin polymerization by latrunculin B
نویسندگان
چکیده
منابع مشابه
Latrunculin B has different effects on pollen germination and tube growth.
The actin cytoskeleton is absolutely required for pollen germination and tube growth, but little is known about the regulation of actin polymer concentrations or dynamics in pollen. Here, we report that latrunculin B (LATB), a potent inhibitor of actin polymerization, had effects on pollen that were distinct from those of cytochalasin D. The equilibrium dissociation constant measured for LATB b...
متن کاملActin polymerization is essential for pollen tube growth.
Actin microfilaments, which are prominent in pollen tubes, have been implicated in the growth process; however, their mechanism of action is not well understood. In the present work we have used profilin and DNAse I injections, as well as latrunculin B and cytochalasin D treatments, under quantitatively controlled conditions, to perturb actin microfilament structure and assembly in an attempt t...
متن کاملArabidopsis FIMBRIN5, an actin bundling factor, is required for pollen germination and pollen tube growth.
Actin cables in pollen tubes serve as molecular tracks for cytoplasmic streaming and organelle movement and are formed by actin bundling factors like villins and fimbrins. However, the precise mechanisms by which actin cables are generated and maintained remain largely unknown. Fimbrins comprise a family of five members in Arabidopsis thaliana. Here, we characterized a fimbrin isoform, Arabidop...
متن کاملPollen tube growth oscillations and intracellular calcium levels are reversibly modulated by actin polymerization.
Prevention of actin polymerization with low concentrations of latrunculin B (Lat-B; 2 nm) exerts a profound inhibitory effect on pollen tube growth. Using flow-through chambers, we show that growth retardation starts after 10 min treatment with 2 nm Lat-B, and by 15 to 20 min reaches a basal rate of 0.1 to 0.2 microm/s, during which the pollen tube exhibits relatively few oscillations. If treat...
متن کاملActin-latrunculin A structure and function. Differential modulation of actin-binding protein function by latrunculin A.
Latrunculin A is used extensively as an agent to sequester monomeric actin in living cells. We hypothesize that additional activities of latrunculin A may be important for its biological activity. Our data are consistent with the formation of a 1:1 stoichiometric complex with an equilibrium dissociation constant of 0.2 to 0.4 micrometer and provide no evidence that the actin-latrunculin A compl...
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ژورنال
عنوان ژورنال: The Plant Journal
سال: 2006
ISSN: 0960-7412,1365-313X
DOI: 10.1111/j.1365-313x.2006.02783.x