scholarly journals Calcium influx at the tip of growing root-hair cells of Arabidopsis thaliana

Planta ◽  
1992 ◽  
Vol 187 (4) ◽  
Author(s):  
JohnW. Schiefelbein ◽  
Al Shipley ◽  
Paul Rowse
Keyword(s):  
Arabidopsis Thaliana ◽  
Hair Cells ◽  
Root Hair ◽  
Calcium Influx ◽  
Root Hair Cells

scholarly journals A role for the RabA4b effector protein PI-4Kβ1 in polarized expansion of root hair cells in Arabidopsis thaliana

2006 ◽  
Vol 172 (7) ◽  
pp. 991-998 ◽  
Author(s):  
Mary L. Preuss ◽  
Aaron J. Schmitz ◽  
Julie M. Thole ◽  
Heather K.S. Bonner ◽  
Marisa S. Otegui ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Hair Cells ◽  
Root Hair ◽  
Root Hairs ◽  
Developmentally Regulated ◽  
Domain Specific ◽  
Polarized Secretion ◽  
Phosphatidylinositol 4 ◽  
Golgi Network ◽  
Root Hair Cells

The RabA4b GTPase labels a novel, trans-Golgi network compartment displaying a developmentally regulated polar distribution in growing Arabidopsis thaliana root hair cells. GTP bound RabA4b selectively recruits the plant phosphatidylinositol 4-OH kinase, PI-4Kβ1, but not members of other PI-4K families. PI-4Kβ1 colocalizes with RabA4b on tip-localized membranes in growing root hairs, and mutant plants in which both the PI-4Kβ1 and -4Kβ2 genes are disrupted display aberrant root hair morphologies. PI-4Kβ1 interacts with RabA4b through a novel homology domain, specific to eukaryotic type IIIβ PI-4Ks, and PI-4Kβ1 also interacts with a Ca2+ sensor, AtCBL1, through its NH2 terminus. We propose that RabA4b recruitment of PI-4Kβ1 results in Ca2+-dependent generation of PI-4P on this compartment, providing a link between Ca2+ and PI-4,5P2–dependent signals during the polarized secretion of cell wall components in tip-growing root hair cells.

Local Positive Feedback Regulation Determines Cell Shape in Root Hair Cells

Science ◽  
2008 ◽  
Vol 319 (5867) ◽  
pp. 1241-1244 ◽  
Author(s):  
S. Takeda ◽  
C. Gapper ◽  
H. Kaya ◽  
E. Bell ◽  
K. Kuchitsu ◽  
...  
Keyword(s):  
Hair Cells ◽  
Positive Feedback ◽  
Root Hair ◽  
Cell Shape ◽  
Feedback Regulation ◽  
Root Hair Cells

The role of plant villin in the organization of the actin cytoskeleton, cytoplasmic streaming and the architecture of the transvacuolar strand in root hair cells of Hydrocharis

Planta ◽  
2000 ◽  
Vol 210 (5) ◽  
pp. 836-843 ◽  
Author(s):  
Motoki Tominaga ◽  
Etsuo Yokota ◽  
Luis Vidali ◽  
Seiji Sonobe ◽  
Peter K. Hepler ◽  
...  
Keyword(s):  
Actin Cytoskeleton ◽  
Hair Cells ◽  
Root Hair ◽  
Cytoplasmic Streaming ◽  
Root Hair Cells

Colonization and invasion of peanut (Arachis hypogaea L.) roots by gusA-marked Bradyrhizobium sp.

2001 ◽  
Vol 79 (6) ◽  
pp. 733-738 ◽  
Author(s):  
Eiji Uheda ◽  
Hiroyuki Daimon ◽  
Fumiki Yoshizako
Keyword(s):  
Cell Wall ◽  
Arachis Hypogaea ◽  
Hair Cells ◽  
Root Hair ◽  
Root Nodules ◽  
Lateral Roots ◽  
Middle Lamella ◽  
Root Surface ◽  
Arachis Hypogaea L ◽  
Root Hair Cells

Tufted rosettes of long root hairs occur in axils of young lateral roots of peanut (Arachis hypogaea L.). Analyses of serial sections of the axils of emerging lateral roots revealed multiple layers of root hair cells. The cells of the outer layer partially overlie the adjacent cells of the inner layer. When Bradyrhizobium cells with an integrated gusA gene were inoculated onto peanut roots and the roots subsequently stained with X-gluc, blue spots indicating the presence of colonies of Bradyrhizobium were observed in the axils of lateral roots. Blue spots were also observed in other areas on the root surface. Transmission electron microscopy revealed that the primary wall of the base of root hair cells has a loose construction. Upon inoculation of Bradyrhizobium, bacteria entered only between root hair cells through the middle lamella. In other areas of the root surface other than axils of lateral roots, the cells had modified walls similar to those at the base of root hair cells. However, invasion by Bradyrhizobium of the cell wall was not observed.Key words: Arachis hypogaea, gusA-marked Bradyrhizobium, cell wall, invasion, root hair cell, root nodules.

scholarly journals Differential Auxin-Transporting Activities of PIN-FORMED Proteins in Arabidopsis Root Hair Cells

2010 ◽  
Vol 153 (3) ◽  
pp. 1046-1061 ◽  
Author(s):  
Anindya Ganguly ◽  
Sang Ho Lee ◽  
Misuk Cho ◽  
Ok Ran Lee ◽  
Heejin Yoo ◽  
...  
Keyword(s):  
Hair Cells ◽  
Root Hair ◽  
Arabidopsis Root ◽  
Root Hair Cells

scholarly journals An endophytic microbe from an unusual volcanic swamp corn seeks and inhabits root hair cells to extract rock phosphate

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Hanan R. Shehata ◽  
Christopher Dumigan ◽  
Sophia Watts ◽  
Manish N. Raizada
Keyword(s):  
Hair Cells ◽  
Root Hair ◽  
Rock Phosphate ◽  
Root Hair Cells
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