1. GNOM regulates root hydrotropism and phototropism independently of PIN-mediated auxin transport.

    Plant Science 215-216:141 (2014) PMID 24388525

    Plant roots exhibit tropisms in response to gravity, unilateral light and moisture gradients. During gravitropism, an auxin gradient is established by PIN auxin transporters, leading to asymmetric growth. GNOM, a guanine nucleotide exchange factor of ARF GTPase (ARF-GEF), regulates PIN localizat...
  2. GNOM regulates root hydrotropism and phototropism independently of PIN-mediated auxin transport

    Plant Science 215-216:141 (2014)

  3. MIZ1-regulated hydrotropism functions in the growth and survival of Arabidopsis thaliana under natural conditions.

    Annals of Botany 112(1):103 (2013) PMID 23658369 PMCID PMC3690989

    Root hydrotropism is a response to water-potential gradients that makes roots bend towards areas of higher water potential. The gene MIZU-KUSSEI1 (MIZ1) that is essential for hydrotropism in Arabidopsis roots has previously been identified. However, the role of root hydrotropism in plant growth ...
  4. MIZ1-regulated hydrotropism functions in the growth and survival of Arabidopsis thaliana under natural conditions.

    Annals of Botany 112(1):103 (2013) PMID 23658369 PMCID PMC3690989

    Root hydrotropism is a response to water-potential gradients that makes roots bend towards areas of higher water potential. The gene MIZU-KUSSEI1 (MIZ1) that is essential for hydrotropism in Arabidopsis roots has previously been identified. However, the role of root hydrotropism in plant growth ...
  5. Molecular mechanisms of hydrotropism in seedling roots of Arabidopsis thaliana (Brassicaceae).

    American Journal of Botany 100(1):25 (2013) PMID 23263156

    Roots show positive hydrotropism in response to moisture gradients, which is believed to contribute to plant water acquisition. This article reviews the recent advances of the physiological and molecular genetic studies on hydrotropism in seedling roots of Arabidopsis thaliana. We identified MIZ...
  6. Molecular mechanisms of hydrotropism in seedling roots of Arabidopsis thaliana (Brassicaceae).

    American Journal of Botany 100(1):25 (2013) PMID 23263156

    Roots show positive hydrotropism in response to moisture gradients, which is believed to contribute to plant water acquisition. This article reviews the recent advances of the physiological and molecular genetic studies on hydrotropism in seedling roots of Arabidopsis thaliana. We identified MIZ...
  7. Overexpression of MIZU-KUSSEI1 enhances the root hydrotropic response by retaining cell viability under hydrostimulated conditions in Arabidopsis thaliana.

    Plant and Cell Physiology 53(11):1926 (2012) PMID 23012350

    Because of their sessile nature, plants evolved several mechanisms to tolerate or avoid conditions where water is scarce. The molecular mechanisms contributing to drought tolerance have been studied extensively, whereas the molecular mechanism underlying drought avoidance is less understood desp...
  8. Overexpression of MIZU-KUSSEI1 enhances the root hydrotropic response by retaining cell viability under hydrostimulated conditions in Arabidopsis thaliana.

    Plant and Cell Physiology 53(11):1926 (2012) PMID 23012350

    Because of their sessile nature, plants evolved several mechanisms to tolerate or avoid conditions where water is scarce. The molecular mechanisms contributing to drought tolerance have been studied extensively, whereas the molecular mechanism underlying drought avoidance is less understood desp...
  9. A possible involvement of autophagy in amyloplast degradation in columella cells during hydrotropic response of Arabidopsis roots.

    Planta 236(4):999 (2012) PMID 22532286

    Seedling roots display not only gravitropism but also hydrotropism, and the two tropisms interfere with one another. In Arabidopsis (Arabidopsis thaliana) roots, amyloplasts in columella cells are rapidly degraded during the hydrotropic response. Degradation of amyloplasts involved in gravisensi...
  10. A possible involvement of autophagy in amyloplast degradation in columella cells during hydrotropic response of Arabidopsis roots.

    Planta 236(4):999 (2012) PMID 22532286

    Seedling roots display not only gravitropism but also hydrotropism, and the two tropisms interfere with one another. In Arabidopsis (Arabidopsis thaliana) roots, amyloplasts in columella cells are rapidly degraded during the hydrotropic response. Degradation of amyloplasts involved in gravisensi...
  11. Light and abscisic acid signalling are integrated by MIZ1 gene expression and regulate hydrotropic response in roots of Arabidopsis thaliana.

    Plant, Cell & Environment 35(8):1359 (2012) PMID 22321255

    Plant roots undergo tropic growth in response to environmental cues, and each tropic response is affected by several environmental stimuli. Even its importance, molecular regulation of hydrotropism has not been largely uncovered. Tropic responses including hydrotropism were impacted by other env...
  12. Light and abscisic acid signalling are integrated by MIZ1 gene expression and regulate hydrotropic response in roots of Arabidopsis thaliana.

    Plant, Cell & Environment 35(8):1359 (2012) PMID 22321255

    Plant roots undergo tropic growth in response to environmental cues, and each tropic response is affected by several environmental stimuli. Even its importance, molecular regulation of hydrotropism has not been largely uncovered. Tropic responses including hydrotropism were impacted by other env...
  13. MIZ1, an essential protein for root hydrotropism, is associated with the cytoplasmic face of the endoplasmic reticulum membrane in Arabidopsis root cells.

    FEBS Letters 586(4):398 (2012) PMID 22285304

    MIZ1 is encoded by a gene essential for root hydrotropism in Arabidopsis. To characterize the property of MIZ1, we used transgenic plants expressing GFP-tagged MIZ1 (MIZ1-GFP) and mutant MIZ1 (MIZ1(G235E)-GFP) in a miz1-1 mutant. Although both chimeric genes were transcribed, the translational p...
  14. MIZ1, an essential protein for root hydrotropism, is associated with the cytoplasmic face of the endoplasmic reticulum membrane in Arabidopsis root cells.

    FEBS Letters 586(4):398 (2012) PMID 22285304

    MIZ1 is encoded by a gene essential for root hydrotropism in Arabidopsis. To characterize the property of MIZ1, we used transgenic plants expressing GFP-tagged MIZ1 (MIZ1-GFP) and mutant MIZ1 (MIZ1(G235E)-GFP) in a miz1-1 mutant. Although both chimeric genes were transcribed, the translational p...
  15. MIZ1, an essential protein for root hydrotropism, is associated with the cytoplasmic face of the endoplasmic reticulum membrane inArabidopsisroot cells

    FEBS Letters 586(4):398 (2012)

    Highlights ► MIZ1 is a previously uncharacterized protein encoded by a gene essential for root hydrotropism. ► GFP-tagged MIZ1 is associated with the endoplasmic reticulum membrane (ER) at the cytosolic side.
  16. MIZ1, an essential protein for root hydrotropism, is associated with the cytoplasmic face of the endoplasmic reticulum membrane inArabidopsisroot cells

    FEBS Letters 586(4):398 (2012) PMID 22285304

    Highlights ► MIZ1 is a previously uncharacterized protein encoded by a gene essential for root hydrotropism. ► GFP-tagged MIZ1 is associated with the endoplasmic reticulum membrane (ER) at the cytosolic side.
  17. Gravistimulation changes the accumulation pattern of the CsPIN1 auxin efflux facilitator in the endodermis of the transition zone in cucumber seedlings.

    Plant Physiology 158(1):239 (2012) PMID 22065422 PMCID PMC3252099

    Cucumber (Cucumis sativus) seedlings grown in a horizontal position develop a specialized protuberance (or peg) on the lower side of the transition zone between the hypocotyl and the root. This occurs by suppressing peg formation on the upper side via a decrease in auxin resulting from a gravita...
  18. MIZU-KUSSEI1 plays an essential role in the hydrotropism of lateral roots inArabidopsis thaliana

    Environmental and Experimental Botany 75:167 (2012)

    Highlights ► We established an experimental system of lateral root hydrotropism in Arabidopsis. ► Lateral roots exhibited hydrotropism irrespective of their length. ► MIZ1 was expressed not only in primary roots but also in lateral roots. ► Lateral roots of miz1 mutant di...
  19. Gravistimulation changes the accumulation pattern of the CsPIN1 auxin efflux facilitator in the endodermis of the transition zone in cucumber seedlings.

    Plant Physiology 158(1):239 (2012) PMID 22065422 PMCID PMC3252099

    Cucumber (Cucumis sativus) seedlings grown in a horizontal position develop a specialized protuberance (or peg) on the lower side of the transition zone between the hypocotyl and the root. This occurs by suppressing peg formation on the upper side via a decrease in auxin resulting from a gravita...
  20. Hormonal regulation of lateral root development in Arabidopsis modulated by MIZ1 and requirement of GNOM activity for MIZ1 function.

    Plant Physiology 157(3):1209 (2011) PMID 21940997 PMCID PMC3252132

    Plant organ development is important for adaptation to a changing environment. Genetic and physiological studies have revealed that plant hormones play key roles in lateral root formation. In this study, we show that MIZU-KUSSEI1 (MIZ1), which was identified originally as a regulator of hydrotro...