Phytochrome interacting factors (PIFs) are essential regulators for sucrose-induced hypocotyl elongation in Arabidopsis

Liu, Zhongjuan; Zhang, Yongqiang; Liu, Rongzhi; Hao, Hualing; Wang, Zhi; Bi, Yurong

doi:10.1016/j.jplph.2011.04.009

Cited by 48 publications

(44 citation statements)

References 51 publications

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“…Consistent with previous studies, wild-type seedlings grown on media supplemented with PAC or PAC and GA had significantly shorter hypocotyls than controls ( Fig. 5A; Cowling and Harberd, 1999;Liu et al, 2011). PAC abolished Suc-induced hypocotyl elongation, with a small hypocotyl length rescue occurring when GA was supplied in combination with PAC (Fig.…”

Section: Phytohormone Signaling and Suc-induced Hypocotyl Elongation supporting

confidence: 90%

“…Auxin, GA, and brassinosteroids are reported to mediate Suc-induced hypocotyl elongation, with a role for auxin identified under light/dark cycles and roles for GA and brassinosteroids identified under extended darkness (de Lucas et al, 2008;Zhang et al, 2010Zhang et al, , 2015Zhang et al, , 2016Liu et al, 2011;Stewart et al, 2011;Lilley et al, 2012;). Consistent with this, our data indicate that auxin signaling has a major role in Suc-induced hypocotyl elongation under light/dark cycles (Fig.…”

Section: Involvement Of Phytohormone Signals In Suc-induced Hypocotylmentioning

confidence: 99%

“…Hypocotyl length is also increased by exogenous and endogenous sugars (Kurata and Yamamoto, 1998;Takahashi et al, 2003;Zhang et al, 2010Zhang et al, , 2015Zhang et al, , 2016Liu et al, 2011;Stewart et al, 2011;Lilley et al, 2012). Under light/dark cycles, exogenous sugars are proposed to cause hypocotyl elongation by inducing auxin signals through the PIF-mediated gene regulation (Stewart et al, 2011;Lilley et al, 2012).…”

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confidence: 99%

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The Energy-Signaling Hub SnRK1 Is Important for Sucrose-Induced Hypocotyl Elongation

et al. 2017

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Emerging seedlings respond to environmental conditions such as light and temperature to optimize their establishment. Seedlings grow initially through elongation of the hypocotyl, which is regulated by signaling pathways that integrate environmental information to regulate seedling development. The hypocotyls of Arabidopsis (Arabidopsis thaliana) also elongate in response to sucrose. Here, we investigated the role of cellular sugar-sensing mechanisms in the elongation of hypocotyls in response to Suc. We focused upon the role of SnRK1, which is a sugar-signaling hub that regulates metabolism and transcription in response to cellular energy status. We also investigated the role of TPS1, which synthesizes the signaling sugar trehalose-6-P that is proposed to regulate SnRK1 activity. Under light/dark cycles, we found that Suc-induced hypocotyl elongation did not occur in tps1 mutants and overexpressors of KIN10 (AKIN10/SnRK1.1), a catalytic subunit of SnRK1. We demonstrate that the magnitude of Suc-induced hypocotyl elongation depends on the day length and light intensity. We identified roles for auxin and gibberellin signaling in Suc-induced hypocotyl elongation under short photoperiods. We found that Suc-induced hypocotyl elongation under light/dark cycles does not involve another proposed sugar sensor, HEXOKINASE1, or the circadian oscillator. Our study identifies novel roles for KIN10 and TPS1 in mediating a signal that underlies Suc-induced hypocotyl elongation in light/dark cycles.

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Section: Phytohormone Signaling and Suc-induced Hypocotyl Elongation supporting

confidence: 90%

Section: Involvement Of Phytohormone Signals In Suc-induced Hypocotylmentioning

confidence: 99%

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confidence: 99%

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The Energy-Signaling Hub SnRK1 Is Important for Sucrose-Induced Hypocotyl Elongation

et al. 2017

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“…10,12,14,15 Sugars repress plant growth in the light, whereas they promote growth in the dark, indicating that the sugar regulation of growth is mediated through different pathways in the light and dark. 4,[15][16][17][18][19] In Arabidopsis, Phytochrome-Interacting Factors (PIFs) and the plant hormone gibberellin (GA) have been shown to play important roles in sugar-induced hypocotyl elongation under both dark and short photoperiod conditions. [17][18][19] In a recent study, we found that sugar-induced hypocotyl elongation and the expression of genes important for cell elongation in Arabidopsis seedlings could be significantly repressed by the treatment with brassinazole (BRZ), a biosynthetic inhibitor of BRs, suggesting that BR is important for sugar regulation of plant growth in darkness.…”

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confidence: 99%

“…4,[15][16][17][18][19] In Arabidopsis, Phytochrome-Interacting Factors (PIFs) and the plant hormone gibberellin (GA) have been shown to play important roles in sugar-induced hypocotyl elongation under both dark and short photoperiod conditions. [17][18][19] In a recent study, we found that sugar-induced hypocotyl elongation and the expression of genes important for cell elongation in Arabidopsis seedlings could be significantly repressed by the treatment with brassinazole (BRZ), a biosynthetic inhibitor of BRs, suggesting that BR is important for sugar regulation of plant growth in darkness. 15 Furthermore, we found that exogenous sugar treatment could enhance the transcription of BZR1 and BES1, the 2 BR transcription factor genes, and that sugar treatment could maintain a higher level of BZR1 proteins in plants grown in the dark, implying that sugar promotion of plant growth in darkness is mediated by the BZR1-and BES1-dependent pathways.…”

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confidence: 99%