Development: Signals in the Development of Cryptogams

Jaenicke, Lothar

doi:10.1007/978-3-642-76293-2_9

Cited by 23 publications

(10 citation statements)

References 410 publications

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“…mutants either sterile or constitutively sexual exhibited unusual cAMP levels (Gilles et al 1984b) and the algae respond to the sexual inducer by an early and a late CAMP-peak (Moka 1988;Jaenicke 1991), hence we proposed that the pheromone's action is mediated by cAMP (Jaenicke 1991). However, we show in Table 1 that the sexual inducer does not influence adenylyl cyclase activity in vitro.…”

Section: Implications For the Sexual Inducer Signal Cascadementioning

confidence: 67%

“…This determination to form gametes correlates with a second cAMP increase, only occurring if the sexual inducer is still present in the medium. As there is also evidence for the involvement of calcium in sexual induction, it is important to understand the interactions of both second messenger systems (Jaenicke 1991). Here, we describe biochemical and regulatory properties of membrane bound adenylyl cyclases of Volvox carteri and correlate these properties with the features of Volvox sexual induction.…”

Section: Introductionmentioning

confidence: 99%

“…During the past two decades, the sexual inducer has been the focus of research, but the elucidation of its primary structure (Mages et al 1988) did not lead to any convincing proposal for the understanding of the signal transduction process. Now, there is accumulating evidence pointing towards the involvement of cAMP in this process (Gilles et al 1984b;Moka 1988;Jaenicke 1991). The sexual inducer triggers a rapid, 8-fold increase of cAMP in vegetative Volvox spheroids of all developmental stages (Moka 1988).…”

Section: Introductionmentioning

confidence: 99%

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Adenylyl Cyclase from the Green Alga Volvox carteri f . nagariensis: Partial Purification and Characterisation

Naß¹,

Moka²,

Jaenicke³

1994

Functional Plant Biol.

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In order to understand changes in cyclic adenylate levels of Volvox carteri during the process of sexual induction, we investigated the biochemical properties of its membrane-bound adenylyl cyclase. Membrane preparations possess low levels of M~~~ -dependent or ~n'+-dependent adenylyl cyclase activity. This activity was solubilised and then purified 7800-fold. The enzyme detergent complex has an apparent molecular mass of 100 kDa. Purified preparations contain a major ATP-binding protein of 33 kDa as shown by affinity labelling. The ~~~+ -d e~e n d e n t basal enzyme activity is regulated by c a Z + , and is highest in the presence of lo-' M c a 2 + , but is inhibited by c a 2 + above lop5 M. ~a~~ at M also blocks activity. Neither calmodulin nor its antagonists affect the enzyme activity, nor do the purified preparations interact with immobilised calmodulin. Further mediators of G-protein action (NaF, or GTP and its derivatives) and forskolins have no influence on the basal activity of this plant enzyme. The function of adenylyl cyclase in sexual induction of Volvox is discussed.

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Section: Implications For the Sexual Inducer Signal Cascadementioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adenylyl Cyclase from the Green Alga Volvox carteri f . nagariensis: Partial Purification and Characterisation

Naß¹,

Moka²,

Jaenicke³

1994

Functional Plant Biol.

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“…A complex series of events is involved in this process. Antheridiol (43) is released by female cells and induces the development of the male sex organs (the antheridia) as well as the synthesis of oogoniols (44 and 45) from fucosterol (46) (Jaenicke, 1991). A specific set of proteins is induced when the antheridia are exposed to antheridiol.…”

Section: Chemmaxis Il'i Fungimentioning

confidence: 99%

Triterpenes and Steroids

Seigler

1998

Plant Secondary Metabolism

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“…Kochert (1978). Mascarenhas (1978) and Jaenicke (1991). Chemosensory behaviour of algae iind protozoa in general has been reviewed by Levandowsky & Hauser (1978) and Van Houlen.…”

Section: Introductionmentioning

confidence: 99%

Gamete orientation and induction of gametogenesis by pheromones in algae and plants

Maier

1993

Plant Cell & Environment

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This review attempts to give a concise overview of the widespread occurrence and the significance, structure and function of pheromones in the chemical communication between individuals of the same species during sexual reproduction in algae and plants. Also included is information on the Oomyctes and the chytridiomycete Allomyces. The terminology in respect of pheromone function and pheromone‐induced reactions is discussed.

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Development: Signals in the Development of Cryptogams

Cited by 23 publications

References 410 publications

Adenylyl Cyclase from the Green Alga Volvox carteri f . nagariensis: Partial Purification and Characterisation

Adenylyl Cyclase from the Green Alga Volvox carteri f . nagariensis: Partial Purification and Characterisation

Triterpenes and Steroids

Gamete orientation and induction of gametogenesis by pheromones in algae and plants

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