Hydrotropism interacts with gravitropism by degrading amyloplasts in seedling roots of Arabidopsis and radish.


:In response to a moisture gradient, roots exhibit hydrotropism to control the orientation of their growth. To exhibit hydrotropism, however, they must overcome the gravitropism that is dominant on Earth. We found that moisture gradient or water stress caused immediate degradation of the starch anchors, amyloplasts, in root columella cells of Arabidopsis and radish (Raphanus sativus). Namely, development of hydrotropic response was accompanied by a simultaneous reduction in starch content in columella cells. Rapid degradation of amyloplasts in columella cells also occurred in the water-stressed roots with sorbitol or mannitol. Both hydrotropically stimulated and water-stressed roots showed a reduced responsiveness to gravity. Roots of a starchless mutant, pgm1-1, showed an enhanced hydrotropism compared with that of the wild type. These results suggest that the reduced responsiveness to gravity is, at least in part, attributable to the degradation of amyloplasts in columella cells. Thus, the reduction in gravitropism allows the roots to exhibit hydrotropism.


Plant Physiol


Plant physiology


Takahashi N,Yamazaki Y,Kobayashi A,Higashitani A,Takahashi H




Has Abstract


2003-06-01 00:00:00














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    abstract::The light intensity-dependent transition to state 1 of dark-adapted anaerobic state 2 Chlamydomonas reinhardtii cells is stimulated by oxygen and by other electron acceptors for photosystem I, such as oxaloacetate and methylviologen. This suggests that the transition to state 1 requires the oxidation of the intersyste...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Forti G,Caldiroli G

    更新日期:2005-02-01 00:00:00

  • Heavy Metals Induce Iron Deficiency Responses at Different Hierarchic and Regulatory Levels.

    abstract::In plants, the excess of several heavy metals mimics iron (Fe) deficiency-induced chlorosis, indicating a disturbance in Fe homeostasis. To examine the level at which heavy metals interfere with Fe deficiency responses, we carried out an in-depth characterization of Fe-related physiological, regulatory, and morphologi...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Lešková A,Giehl RFH,Hartmann A,Fargašová A,von Wirén N

    更新日期:2017-07-01 00:00:00

  • Multiple Integrated Root Phenotypes Are Associated with Improved Drought Tolerance.

    abstract::To test the hypothesis that multiple integrated root phenotypes would co-optimize drought tolerance, we phenotyped the root anatomy and architecture of 400 mature maize (Zea mays) genotypes under well-watered and water-stressed conditions in the field. We found substantial variation in all 23 root phenes measured. A p...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Klein SP,Schneider HM,Perkins AC,Brown KM,Lynch JP

    更新日期:2020-07-01 00:00:00

  • Biphasic fluence response curves for induction of seed germination.

    abstract::Fluence-response curves for the induction of seed germination after 24 hours pretreatment at 35 degrees C of Rumex obtusifolius and Arabidopsis thaliana show two phases of response: (a) a very low fluence-response (10(-4) - 10(-1) micromoles per square meter) and (b) a low fluence-response (1 - 10(3) micromoles per sq...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Kendrick RE,Cone JW

    更新日期:1985-09-01 00:00:00

  • Cytokinin and inhibitor activities in the avocado fruit mesocarp.

    abstract::No cytokinin activity was found in methanolic mesocarp extracts after purification with petroleum ether and ethyl acetate. Cytokinin activity did appear, however, in aqueous fraction after acid hydrolysis or passage through Dowex 50 (H(+)) ion exchange columns. The level of this activity, the fruit growth rate, and th...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Gazit S,Blumenfeld A

    更新日期:1970-08-01 00:00:00

  • Cyclopropane Fatty acids in relation to earliness in spring and drought tolerance in plants.

    abstract::Long chain cyclopropane fatty acids were observed in the sulfolipid fraction extracted from leaves of the early spring plants Galanthus nivalis L. and Anthriscus silvestris L. (Hoffm.). The content of cyclopropane fatty acids with 25 carbon atoms appeared to be clearly correlated with earliness in spring, and it range...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Kuiper PJ,Stuiver B

    更新日期:1972-03-01 00:00:00

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    abstract::Red light-induced changes in the gravitropism of roots of Zea mays variety Merit is a very low fluence response with a threshold of 10(-9) moles per square meter and is not reversible by far red light. Blue light also affects root gravitropism but the sensitivity of roots to blue is 50 to 100 times less than to an eq...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Feldman LJ,Briggs WR

    更新日期:1987-01-01 00:00:00

  • A 2-Oxoglutarate-Dependent Dioxygenase Mediates the Biosynthesis of Glucoraphasatin in Radish.

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Kakizaki T,Kitashiba H,Zou Z,Li F,Fukino N,Ohara T,Nishio T,Ishida M

    更新日期:2017-03-01 00:00:00

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Wang SZ,Esen A

    更新日期:1986-05-01 00:00:00

  • Resolution and Properties of Two High Affinity Cyclic Adenosine 3':5'-monophosphate-Binding Proteins from Wheat Germ.

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Polya GM,Bowman JA

    更新日期:1981-09-01 00:00:00

  • The low-oxygen-induced NAC domain transcription factor ANAC102 affects viability of Arabidopsis seeds following low-oxygen treatment.

    abstract::Low-oxygen stress imposed by field waterlogging is a serious impediment to plant germination and growth. Plants respond to waterlogging with a complex set of physiological responses regulated at the transcriptional, cellular, and tissue levels. The Arabidopsis (Arabidopsis thaliana) NAC domain-containing gene ANAC102 ...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Christianson JA,Wilson IW,Llewellyn DJ,Dennis ES

    更新日期:2009-04-01 00:00:00

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    authors: Weibull J,Ronquist F,Brishammar S

    更新日期:1990-01-01 00:00:00

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    authors: Yan H,Chretien R,Ye J,Rommens CM

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    authors: Schmidt GW,Jirschitzka J,Porta T,Reichelt M,Luck K,Torre JC,Dolke F,Varesio E,Hopfgartner G,Gershenzon J,D'Auria JC

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Ho I,Below FE,Hageman RH

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    pub_type: 杂志文章


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    更新日期:2007-10-01 00:00:00

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    pub_type: 杂志文章


    authors: Mok MC,Mok DW,Dixon SC,Armstrong DJ,Shaw G

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    更新日期:2014-06-01 00:00:00

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    journal_title:Plant physiology

    pub_type: 杂志文章


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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Weber JA,Tenhunen JD,Gates DM,Lange OL

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    journal_title:Plant physiology

    pub_type: 杂志文章


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    更新日期:1967-12-01 00:00:00

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Hussain MM,Melcher U,Whittle T,Williams A,Brannan CM,Mitchell ED

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  • Isolation of Guard Cell Protoplasts from Mechanically Prepared Epidermis of Vicia faba Leaves.

    abstract::A method for isolating guard cell protoplasts (GCP) from mechanically prepared epidermis of Vicia faba is described. Epidermis was prepared by homogenizing leaves in a Waring blender in a solution of 10% Ficoll, 5 millimolar CaCl(2), and 0.1% polyvinylpyrrolidone 40 (PVP). Attached mesophyll and epidermal cells were r...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Kruse T,Tallman G,Zeiger E

    更新日期:1989-08-01 00:00:00

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    abstract::Aspartate aminotransferase (AAT), a key enzyme in the biosynthesis of aspartate and asparagine, occurs as two forms in alfalfa (Medicago sativa L.), AAT-1 and AAT-2. Both forms were purified to near homogeneity, and high titer polyclonal antibodies produced to the native proteins. Alfalfa AAT-1 was purified from root ...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Farnham MW,Miller SS,Griffith SM,Vance CP

    更新日期:1990-06-01 00:00:00

  • Assay of Proton-Coupled Glycolate and D-Glycerate Transport into Chloroplast Inner Envelope Membrane Vesicles by Stopped-Flow Fluorescence.

    abstract::The transport of glycolate and D-glycerate across the inner envelope membrane of intact chloroplasts is rapid and mediated by a translocator with proton/substrate symport activity. The true initial rate of glycolate or D-glycerate transport could not be measured by conventional methods. To resolve the initial rates of...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Young XK,McCarty RE

    更新日期:1993-03-01 00:00:00

  • Oxygen-18 and deuterium labeling studies of choline oxidation by spinach and sugar beet.

    abstract::Chenopods synthesize betaine by a two-step oxidation of choline: choline --> betaine aldehyde --> betaine. The pathway is chloroplastic; the first step has been shown in isolated spinach (Spinacia oleracea L.) chloroplasts to be O(2)- and light-dependent, the role of light being to provide reducing power (P Weigel, EA...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Lerma C,Hanson AD,Rhodes D

    更新日期:1988-11-01 00:00:00

  • Arabidopsis INOSITOL TRANSPORTER2 mediates H+ symport of different inositol epimers and derivatives across the plasma membrane.

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Schneider S,Schneidereit A,Udvardi P,Hammes U,Gramann M,Dietrich P,Sauer N

    更新日期:2007-12-01 00:00:00

  • GROWTH REGULATING FACTOR5 stimulates Arabidopsis chloroplast division, photosynthesis, and leaf longevity.

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Vercruyssen L,Tognetti VB,Gonzalez N,Van Dingenen J,De Milde L,Bielach A,De Rycke R,Van Breusegem F,Inzé D

    更新日期:2015-03-01 00:00:00

  • Variation in sulfur and selenium accumulation is controlled by naturally occurring isoforms of the key sulfur assimilation enzyme ADENOSINE 5'-PHOSPHOSULFATE REDUCTASE2 across the Arabidopsis species range.

    abstract::Natural variation allows the investigation of both the fundamental functions of genes and their role in local adaptation. As one of the essential macronutrients, sulfur is vital for plant growth and development and also for crop yield and quality. Selenium and sulfur are assimilated by the same process, and although p...

    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Chao DY,Baraniecka P,Danku J,Koprivova A,Lahner B,Luo H,Yakubova E,Dilkes B,Kopriva S,Salt DE

    更新日期:2014-11-01 00:00:00

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    journal_title:Plant physiology

    pub_type: 杂志文章


    authors: Terry ME,Jones RL

    更新日期:1981-07-01 00:00:00