Role of Gibberellins in the Thermoperiodic Regulation of Stem Elongation in<i>Dendranthema grandiflorum</i>Tzvelev

Nishijima, Takaaki; Nonaka, Michiyasu; Koshioka, Masaji; Ikeda, Hiroshi; Douzono, Mitsuru; Yamazaki, Hiroko; Mander, Lewis N.

doi:10.1271/bbb.61.1362

Cited by 17 publications

(12 citation statements)

References 8 publications

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“…Recent reports support the hypothesis that daily temperature alterations may control stem elongation through an altered level of bioactive GA 1 (Grindal et al 1998, Jensen et al 1996, Langton et al 1997, Nishijima et al 1997. The findings of a higher ratio of GA 8 to GA 1 in the stem tissue in pea grown under negative compared with positive DIF (Grindal et al 1998) could indicate that temperature alterations may regulate the levels of endogenous GA 1 by affecting inactivation of GA 1 by 2␤-hydroxylation.…”

mentioning

confidence: 70%

“…Correspondingly, growth inhibitors like B-9 (Moe 1990) and ancymidole (Erwin et al 1989) inhibit stem elongation more under positive than negative DIF. Recently, a reduced content of endogenous GAs in plants grown under negative compared with positive DIF has been reported for several species (Grindal et al 1998, Jensen et al 1996, Langton et al 1997, Nishijima et al 1997.…”

Section: Discussionmentioning

confidence: 96%

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The Response to Gibberellin in Pisum sativum Grown under Alternating Day and Night Temperature

Grindal

Junttila

Reid

et al. 1998

J Plant Growth Regul

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The application of gibberellins (GA) reduces the difference in stem elongation observed under a low day (DT) and high night temperature (NT) combination (negative DIF) compared with the opposite regime, a high DT/low NT (positive DIF). The aim of this work was to investigate possible thermoperiodic effects on GA metabolism and tissue sensitivity to GA by comparing the response to exogenously applied GA (in particular, GA 1 and GA 3 ) in pea plants (Pisum sativum cv. Torsdag) grown under contrasting DIF. Control plants not treated with growth inhibitors or additional GA were 38% shorter under negative (DT/NT 13/21°C) than positive DIF (DT/NT 21/13°C) because of shorter internodes. Additional GA 1 or GA 3 decreased the difference between positive and negative DIF. In pea plants dwarfed with paclobutrazol, which inhibits GA biosynthesis at an early step, the response to GA 1 was reduced more strongly by negative compared with positive DIF than the response to GA 3 . The induced stem elongation by GA 19 and GA 20 did not deviate significantly from the response to GA 1 . Plants treated with prohexadionecalcium, an inhibitor of both the production and the inactivation of GA 1 , grew equally tall under the two temperature regimes in response to both GA 1 and GA 3 . We hypothesize that the reduced response to GA 1 compared with GA 3 in paclobutrazol-treated plants grown under negative DIF is caused by a higher rate of 2␤-hydroxylation of GA 1 into GA 8 under negative than positive DIF. This contributes to lower levels of GA 1 and consequently shorter stems and internodes in pea plants grown under negative than positive DIF. Differences in tissue sensitivity to GA alone cannot account for this specific thermoperiodic effect on stem elongation. Key Words. DIF-Gibberellin-Inactivation-Pea-R e s p o n s e -S t e m e l o n g a t i o n -T e m p e r a t u r eThermoperiodismDaily alterations in day (DT) and night temperature (NT) affect stem and internode elongation in long day plants as well as in short day plants Heins 1995, Myster and. In general, plants grow tall with long internodes when the DT is higher than the NT, whereas a short phenotype with short internodes is developed under a DT lower than the NT. These thermoperiodic responses have been utilized for control of plant height in commercial plant production in climatecontrolled conditions (Bakken and Flønes 1995, Erwin et al. 1989, Moe 1994. The two opposite temperature combinations have been referred to as temperature regimes with a positive (positive DIF, high DT/low NT) and negative difference between DT and NT (negative DIF, low DT/high NT), respectively.Many reports (Ihlebekk et al. 1995, Moe 1990, Pinthus and Meiri 1979, Tangerås 1979, Zieslin and Tsujita 1988 have suggested that the effects of daily temperature alternations on stem elongation are related to the metabolism and sensitivity to gibberellin (GA), a plant hormone required for stem elongation in plants (Graebe 1987). These studies have examined mainly the responses to external applications of GAs in...

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mentioning

confidence: 70%

Section: Discussionmentioning

confidence: 96%

The Response to Gibberellin in Pisum sativum Grown under Alternating Day and Night Temperature

Grindal

Junttila

Reid

et al. 1998

J Plant Growth Regul

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“…It is well established that a change in temperature modifies endogenous GA levels [56–58], as well as the plant’s sensitivity to the application of exogenous growth-active GAs [59]. Endogenous GA levels decrease as temperature is lowered and this is associated with decreased shoot growth in carrot ( Daucus carota L.) [60], wheat ( Triticum aestivum L.) [61], Campanula isophylla [62], Dendranthema grandiflorum [63] and sunflower ( Helianthus annuus L.) [58]. …”

Section: Cbf–hormone Interactions Cold Acclimation and Dwarf Phenmentioning

confidence: 99%

Role of CBFs as Integrators of Chloroplast Redox, Phytochrome and Plant Hormone Signaling during Cold Acclimation

Kurepin

Dahal

Savitch

et al. 2013

IJMS

132

100

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Cold acclimation of winter cereals and other winter hardy species is a prerequisite to increase subsequent freezing tolerance. Low temperatures upregulate the expression of C-repeat/dehydration-responsive element binding transcription factors (CBF/DREB1) which in turn induce the expression of COLD-REGULATED (COR) genes. We summarize evidence which indicates that the integration of these interactions is responsible for the dwarf phenotype and enhanced photosynthetic performance associated with cold-acclimated and CBF-overexpressing plants. Plants overexpressing CBFs but grown at warm temperatures mimic the cold-tolerant, dwarf, compact phenotype; increased photosynthetic performance; and biomass accumulation typically associated with cold-acclimated plants. In this review, we propose a model whereby the cold acclimation signal is perceived by plants through an integration of low temperature and changes in light intensity, as well as changes in light quality. Such integration leads to the activation of the CBF-regulon and subsequent upregulation of COR gene and GA 2-oxidase (GA2ox) expression which results in a dwarf phenotype coupled with increased freezing tolerance and enhanced photosynthetic performance. We conclude that, due to their photoautotrophic nature, plants do not rely on a single low temperature sensor, but integrate changes in light intensity, light quality, and membrane viscosity in order to establish the cold-acclimated state. CBFs appear to act as master regulators of these interconnecting sensing/signaling pathways.

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“…Para ARBOS (1992), os períodos com baixos valores de temperatura e radiação modificam a taxa de crescimento, tendo como conseqüência a redução da altura da planta e do tamanho das inflorescências. NISHIJIMA et al (1997) temperatura desfavoráveis ao crescimento de certas cultivares de crisântemo, entre elas a "Gompier Chá". Esta cultivar possui a inflorescência do tipo decorativa de coloração rosa, bem aceita pelo mercado.…”

Section: Introductionunclassified

Ácido giberélico e dia curto interrompido em crisântemo de corte (Dendranthema grandiflora, Tzvelev., "Gompier Chá")

2007

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Role of Gibberellins in the Thermoperiodic Regulation of Stem Elongation inDendranthema grandiflorumTzvelev

Cited by 17 publications

References 8 publications

The Response to Gibberellin in Pisum sativum Grown under Alternating Day and Night Temperature

The Response to Gibberellin in Pisum sativum Grown under Alternating Day and Night Temperature

Role of CBFs as Integrators of Chloroplast Redox, Phytochrome and Plant Hormone Signaling during Cold Acclimation

Ácido giberélico e dia curto interrompido em crisântemo de corte (Dendranthema grandiflora, Tzvelev., "Gompier Chá")

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