Increase in the Activity of Phenylalanine Ammonia-Lyase during the Non-Photoperiodic Induction of Flowering in Seedlings of Morning Glory (Pharbitis nil)

Hirai, Nobuhiro; Kuwano, Yutaka; Kojima, Yasuhiro; Koshimįzu, Koichi; Shinozaki, Masateru; Takimoto, Atsushi

doi:10.1093/oxfordjournals.pcp.a078761

Cited by 43 publications

(11 citation statements)

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“…The short-day plant Pharbitis nil (synonym Ipomoea nil ) can fl ower under long days when grown in tap water (poor-nutrition conditions), at 12-15°C (low-temperature conditions) or under 15,000-20,000 lux light (high-intensity light conditions) Shinozaki et al , 1988aShinozaki et al , b, 1994Shinozaki 1985 ;Swe et al 1985 ;Hirai et al 1993Hirai et al , 1994Hirai et al , 1995 . These fl owering responses were mainly studied by Dr. M. Shinozaki and his coworkers at Kyoto University, Japan, who called such fl owering "long-day fl owering."…”

Section: History Of Stress-induced Floweringmentioning

confidence: 99%

“…A white-fl owered mutant of Violet responded to low temperature more sensitively and accumulated more CGA than did the wild type. Further, the fl owering induced by these conditions was accompanied by an increase in phenylalanine ammonia-lyase (PAL) activity (Hirai et al 1995 ) . Aminooxyacetic acid (AOA) inhibited fl owering (Shinozaki et al 1988aHatayama and Takeno 2003 ) .…”

Section: History Of Stress-induced Floweringmentioning

confidence: 99%

“…Stress promotes the metabolism of t -cinnamic acid to SA via benzoic acid (Gidrol et al 1996 ;Mauch-Mani and Slusarenko 1996 ) . The fl owering induced by these conditions is accompanied by an increase in PAL activity (Hirai et al 1995 ) , and AOA inhibited fl owering in P. nil (Shinozaki et al 1988aHatayama and Takeno 2003 ) . Some compound(s) in the metabolic pathway regulated by PAL might act as fl owering stimuli.…”

Section: Endogenous Substances Involved In Stress-induced Floweringmentioning

confidence: 99%

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Stress-Induced Flowering

Takeno

2011

Abiotic Stress Responses in Plants

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Plants have a tendency to fl ower if placed under unsuitable growth conditions. A review of the literature reporting such nonphotoperiodic fl owering indicated that most of the factors responsible for fl owering could be regarded as stress. Those stress factors include poor nutrition, high or low temperature, high-or low-intensity light, ultraviolet light, and many others. This fl owering would be called stress-induced fl owering. The plants that were induced to fl ower by stress reached anthesis, produced fertile seeds, and the progeny developed normally in Pharbitis nil and Perilla frutescens var. crispa . Grafting experiments using two varieties of P. nil revealed that a transmissible fl owering stimulus is involved in stressinduced fl owering. Salicylic acid and/or the fl owering gene FLOWERING LOCUS T may be involved in the stress-induced fl owering of P. nil , P. frutescens , Arabidopsis thaliana , and Lemna paucicostata . The stressed plants do not need to wait the arrival of a season when photoperiodic conditions are suitable for fl owering, and such precocious fl owering might assist in species preservation. Thus, stress-induced fl owering might have a biological benefi t and should be considered as important as photoperiodic fl owering and vernalization.

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Section: History Of Stress-induced Floweringmentioning

confidence: 99%

Section: History Of Stress-induced Floweringmentioning

confidence: 99%

Section: Endogenous Substances Involved In Stress-induced Floweringmentioning

confidence: 99%

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Stress-Induced Flowering

Takeno

2011

Abiotic Stress Responses in Plants

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“…Phenylalanine ammonia-lyase (PAL) activity increases when flowering is induced under these growth conditions (Hirai et al, 1995). These results suggest that such conditions may stimulate flowering through a common mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Stress-induced flowering is inhibited by the PAL inhibitor aminooxyacetic acid (AOA), and therefore it is hypothesized that some compound or compounds in the metabolic pathway regulated by PAL act as flowering stimuli (Hirai et al, 1995;Hatayama and Takeno, 2003). However, a transmissible flowering stimulus like florigen, which is involved in photoperiodic flowering, has not been reported in stress-induced flowering.…”

Section: Introductionmentioning

confidence: 99%