Effect of red and far-red irradiation on ABA and IAA content in Pinus sylvestris L. seed during the escape time period from photocontrol

Tillberg, Elisabeth; Björkman, Per‐Olof

doi:10.1007/bf00207585

Cited by 8 publications

(1 citation statement)

References 13 publications

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“…Recently, Seo et al (2006) showed that ABA levels in seeds decrease in red light, that this reduction in ABA depends on functional phyB, and that the expression of genes involved in ABA metabolism/ catabolism is regulated by phytochrome in a photoreversible manner. Moreover, phytochrome-mediated ABA degradation has been documented in some taxa (Tillberg and Bjorkman 1993;Kraepiel et al 1994), and GA (whose synthesis is stimulated by phytochrome) is associated with decreased levels of ABA in lettuce (Weatherwax et al 1996;Ogawa et al 2003;Gonai et al 2004;Toyomasu et al 2004). In A. thaliana, in contrast, addition of GA caused a transient increase in ABA (Ali-Rachedi et al 2004).…”

Section: Phya-phyd Dormancymentioning

confidence: 96%

New Roles of Phytochromes during Seed Germination

Heschel

Butler

Barua

et al. 2008

International Journal of Plant Sciences

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Among the most important environmental sensors in plants are the phytochromes, members of a duplicatedgene family of photoreceptors. We characterized the functional diversification of this gene family with respect to a single ecologically important and highly environmentally sensitive process-germination-and thereby addressed the consequence of gene duplication in the evolution of environmental sensitivity. We exposed single and multiple mutants of different phytochromes of Arabidopsis thaliana to dormancy-breaking or dormancyinducing treatments that resemble different seasonal environmental conditions, and we recorded their germination responses. Much redundancy of function occurred, but an impressive degree of functional diversification was also apparent. Specifically, PHYB was an important contributor to germination when seeds did not receive lowtemperature imbibition. It interacted nonadditively with PHYA, whose contribution to germination was redundant to that of PHYB and most apparent when seeds experienced high followed by low temperatures. We also determined that PHYD was necessary for full germination when seeds were exposed to a high temperature during imbibition. PHYE appears to contribute redundantly to germination, except when seeds experienced high followed by low temperatures. Finally, we found new evidence that PHYA and possibly PHYD redundantly contribute to the suppression of germination. The diversification of activities of all these phytochromes during this one process of germination suggests that they all have a combined function in the regulation of germination responses to complex seasonal conditions and that gene duplication can contribute to the evolution of precise responses to variable environments.

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Section: Phya-phyd Dormancymentioning

confidence: 96%

New Roles of Phytochromes during Seed Germination

Heschel

Butler

Barua

et al. 2008

International Journal of Plant Sciences

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The influence of light quality on rose flower senescence: involvement of abscisic acid

et al. 1995

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The aim of this work was to study the impact of light applied during preharvest culture on the subsequent senescence of cut rose flower and to analyse the possible involvement of abscisic acid (ABA). The longevity of cut rose flowers was longer when rose plants were previously grown under high pressure sodium lamps than under metal halide lamps. A change in light source did not lead to a change in leaf ABA content but significantly affected the petal ABA content. The relationship between ABA level and flower longevity, previously reported for differences of genetic origin, was again observed for culture-induced differences: the higher the ABA level at harvest, the shorter the vase-life observed.

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Seed germination in a tomato male-sterile mutant is resistant to osmotic, salt and low-temperature stresses

Fellner¹,

Sawhney²

2001

Theor Appl Genet

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Effect of red and far-red irradiation on ABA and IAA content in Pinus sylvestris L. seed during the escape time period from photocontrol

Cited by 8 publications

References 13 publications

New Roles of Phytochromes during Seed Germination

New Roles of Phytochromes during Seed Germination

The influence of light quality on rose flower senescence: involvement of abscisic acid

Seed germination in a tomato male-sterile mutant is resistant to osmotic, salt and low-temperature stresses

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