Estimation of Messenger RNA in Fern Gametophytes
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چکیده
منابع مشابه
Photocontrol of Chloroplast Lipids in Fern Gametophytes
In the gametophyte of the fern Anem ia phyllitidis synthesis of linolenic acid esterified in monogalactosyldiglyceride requires light. By induction-reversion experiments it could be demon strated that this light-dependent step is mediated by phytochrome. There is also evidence for phytochrome control of galactolipid and hexadecatrienoic acid synthesis. In continuous blue light the synthesis of...
متن کاملThe induction of biplanar growth in fern gametophytes in the presence of RNA base analogues.
The RNA base analogues, 5-fluorouracil, 2-thiouracil, and 8-azaguanine, inhibit the growth of Dryopteris borreri, but do not prevent the transition from filamentous to biplanar growth. Transition, which occurs only when the filament has developed to 4 or 5 cells, may be considerably delayed, due to inhibition of filamentous growth, but it always occurs when the critical cell number of the filam...
متن کاملCharacterization of mutations that feminize gametophytes of the fern Ceratopteris.
Gametophytes of the fern Ceratopteris are either male or hermaphroditic. Their sex is epigenetically determined by the pheromone antheridiogen, which is secreted by the hermaphrodite and induces male and represses female development in other young, sexually undetermined gametophytes. To understand how antheridiogen represses the development of female traits at the genetic level, 16 new mutation...
متن کاملDevelopmental morphology of strap-shaped gametophytes of Colysis decurrens: a new look at meristem development and function in fern gametophytes.
BACKGROUND AND AIMS The gametophytes of most homosporous ferns are cordate-thalloid in shape. Some are strap- or ribbon-shaped and have been assumed to have evolved from terrestrial cordate shapes as an adaptation to epiphytic habitats. The aim of the present study was to clarify the morphological evolution of the strap-shaped gametophyte of microsoroids (Polypodiaceae) by precise analysis of t...
متن کاملIs Riboflavin the Photoreceptor in the Induction of Two-dimensional Growth in Fern Gametophytes?
Blue light controls the development of 2-dimensional form in the gametophyte phase of numerous ferns (2 and literature therein). Although the photoreceptor for this system is still unknown, it has been hypothesized to be a flavoprotein (7). Yeoh and Raghavan (11) have presented data which they interpreted as evidence for the existence of riboflavin (or lumichrome) as the photoreceptor. This con...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 1967
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.32.216