Control of morphogenesis in the gametophyte of a fern by light and growth hormones

Swami, Piyush; Raghavan, V.

doi:10.1139/b80-179

Cited by 23 publications

(14 citation statements)

References 5 publications

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“…The block to antheridium development is especially significant since in this regard ABA acts as an antagonist to the welldocumented antheridiogen system in Ceratopteris. The concentrations at which exogenously supplied ABA is active in Ceratopteris (10-6-104M) are at or well below the levels commonly utilized experimentally in other ferns (Cheng and Schraudolf 1974;Swami and Raghavan 1980) and in angiosperms (Walton 1980 of M or greater are employed. In addition, after growth on ABA supplemented medium for a period of 25 days, meristem and archegonia development are initiated while antheridia development continues to be suppressed.…”

Section: Discussionmentioning

confidence: 89%

Abscisic acid blocks antheridiogen-induced antheridium formation in gametophytes of the fern Ceratopteris

Hickok¹

1983

Can. J. Bot.

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Growth and differentiation of haploid gametophytes of the fern Ceratopteris are influenced by antheridiogen and abscisic acid. Antheridiogen induces the premature formation of male sex organs (antheridia), while abscisic acid, at a concentration of 10−4 M, completely blocks antheridia formation, even in the presence of antheridiogen. In addition, abscisic acid stimulates rhizoid production at concentrations of 10−6–10−5 M but becomes inhibitory at higher concentrations. Meristem development, which is normally at the margins of gametophytes, is often submarginal or central in the presence of abscisic acid and results in the formation of cup-shaped female gametophytes bearing archegonia.

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Section: Discussionmentioning

confidence: 89%

Abscisic acid blocks antheridiogen-induced antheridium formation in gametophytes of the fern Ceratopteris

Hickok¹

1983

Can. J. Bot.

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“…It has been shown that ABA is present in various fern species (Weiler 1979;Cheng and Schraudolf 1974;Yamane et al 1980Yamane et al , 1988Pilate et al 1989) and in some lycophytes. In ferns, ABA plays roles in inhibition of growth (Swami and Raghavan 1980;Chia and Raghavan 1982;Hickok 1983), control of sex determination (Hickok 1983;Warne and Hickok 1991), and heterophyllous switch in aquatic fern plants (Liu 1984;Hsu et al 2001;Lin et al 2005). In addition, ABA is thought to play a role in desiccation tolerance in ferns and lycophytes (Reynolds and Bewley 1993a, b;Pence 2000;Liu et al 2008).…”

Section: Introductionmentioning

confidence: 99%

ABA in bryophytes: how a universal growth regulator in life became a plant hormone?

2011

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Abscisic acid (ABA) is not a plant-specific compound but one found in organisms across kingdoms from bacteria to animals, suggesting that it is a ubiquitous and versatile substance that can modulate physiological functions of various organisms. Recent studies have shown that plants developed an elegant system for ABA sensing and early signal transduction mechanisms to modulate responses to environmental stresses for survival in terrestrial conditions. ABA-induced increase in stress tolerance has been reported not only in vascular plants but also in non-vascular bryophytes. Since bryophytes are the key group of organisms in the context of plant evolution, clarification of their ABA-dependent processes is important for understanding evolutionary adaptation of land plants. Molecular approaches using Physcomitrella patens have revealed that ABA plays a role in dehydration stress tolerance in mosses, which comprise a major group of bryophytes. Furthermore, we recently reported that signaling machinery for ABA responses is also conserved in liverworts, representing the most basal members of extant land plant lineage. Conservation of the mechanism for ABA sensing and responses in angiosperms and basal land plants suggests that acquisition of this mechanism for stress tolerance in vegetative tissues was one of the critical evolutionary events for adaptation to the land. This review describes the role of ABA in basal land plants as well as non-land plant organisms and further elaborates on recent progress in molecular studies of model bryophytes by comparative and functional genomic approaches.

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“…Like spores, the sensitivity of protonemata (five-to sixcelled stage gametophyte) of ferns to blue, red and far-red light varies greatly. In Lygodium japonicum, gametophytes exhibited planar morphology under red and blue light, but remained filamentous under far-red light (Swami and Raghavan 1980). These light affected growth forms were the result of changed patterns of cell divisions in the protonemata.…”

Section: Resultsmentioning

confidence: 99%

In vitro culture of Drynaria fortunei, a fern species source of Chinese medicine “Gu-Sui-Bu”

Chang

Agrawal

Kuo

et al. 2007

In Vitro Cell.Dev.Biol.-Plant

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This study reports spore germination, early gametophyte development and change in the reproductive phase of Drynaria fortunei, a medicinal fern, in response to changes in pH and light spectra. Germination of D. fortunei spores occurred on a wide range of pH from 3.7 to 9.7. The highest germination (63.3%) occurred on ½ strength Murashige and Skoog basal medium supplemented with 2% sucrose at pH 7.7 under white light condition. Among the different light spectra tested, red, far-red, blue, and white light resulted in 71.3, 42.3, 52.7, and 71.0% spore germination, respectively. There were no morphological differences among gametophytes grown under white and blue light. Elongated or filamentous but multiseriate gametophytes developed under red light, whereas under far-red light gametophytes grew as uniseriate filaments consisting of mostly elongated cells. Different light spectra influenced development of antheridia and archegonia in the gametophytes. Gametophytes gave rise to new gametophytes and developed antheridia and archegonia after they were transferred to culture flasks. After these gametophytes were transferred to plastic tray cells with potting mix of tree fern trunk fiber mix (TFTF mix) and peatmoss the highest number of sporophytes was found. Sporophytes grown in pots developed rhizomes.

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Control of morphogenesis in the gametophyte of a fern by light and growth hormones

Cited by 23 publications

References 5 publications

Abscisic acid blocks antheridiogen-induced antheridium formation in gametophytes of the fern Ceratopteris

Abscisic acid blocks antheridiogen-induced antheridium formation in gametophytes of the fern Ceratopteris

ABA in bryophytes: how a universal growth regulator in life became a plant hormone?

In vitro culture of Drynaria fortunei, a fern species source of Chinese medicine “Gu-Sui-Bu”

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