A gradient of endogenous calcium forms in mucilage of graviresponding roots of Zea mays

Randy Moore, W. Mark Fondren

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Agar blocks that contacted the upper sides of tips of horizontally-oriented roots of Zea mays contain significantly less calcium (Ca) than blocks that contacted the lower sides of such roots. This gravity-induced gradient of Ca forms prior to the onset of gravicurvature, and does not form across tips of vertically-oriented roots or roots of agravitropic mutants. These results indicate that (1) Ca can be collected from mucilage of graviresponding roots, (2) gravity induces a downward movement of endogenous Ca in mucilage overlying the root tip, (3) this gravity-induced gradient of Ca does not form across tips of agravitropic roots, and (4) formation of a Ca gradient is not a consequence of gravicurvature. These results are consistent with gravity-induced movement of Ca being a trigger for subsequent redistribution of growth effectors (e.g. auxin) that induce differential growth and gravicurvature.

Original languageEnglish (US)
Pages (from-to)113-116
Number of pages4
JournalAnnals of Botany
Volume61
Issue number1
StatePublished - Jan 1 1988

Fingerprint

mucilages
Zea mays
calcium
gravity
root tips
auxins
agar
mutants

Keywords

  • Atomic absorption
  • Calcium
  • Corn
  • Gravitropism (root)
  • Zea mays

Cite this

A gradient of endogenous calcium forms in mucilage of graviresponding roots of Zea mays. / Moore, Randy; Fondren, W. Mark.

In: Annals of Botany, Vol. 61, No. 1, 01.01.1988, p. 113-116.

Research output: Contribution to journalArticle

@article{1628f6dc37ac4eb6b27bf4069a20c36a,
title = "A gradient of endogenous calcium forms in mucilage of graviresponding roots of Zea mays",
abstract = "Agar blocks that contacted the upper sides of tips of horizontally-oriented roots of Zea mays contain significantly less calcium (Ca) than blocks that contacted the lower sides of such roots. This gravity-induced gradient of Ca forms prior to the onset of gravicurvature, and does not form across tips of vertically-oriented roots or roots of agravitropic mutants. These results indicate that (1) Ca can be collected from mucilage of graviresponding roots, (2) gravity induces a downward movement of endogenous Ca in mucilage overlying the root tip, (3) this gravity-induced gradient of Ca does not form across tips of agravitropic roots, and (4) formation of a Ca gradient is not a consequence of gravicurvature. These results are consistent with gravity-induced movement of Ca being a trigger for subsequent redistribution of growth effectors (e.g. auxin) that induce differential growth and gravicurvature.",
keywords = "Atomic absorption, Calcium, Corn, Gravitropism (root), Zea mays",
author = "Randy Moore and Fondren, {W. Mark}",
year = "1988",
month = "1",
day = "1",
language = "English (US)",
volume = "61",
pages = "113--116",
journal = "Annals of Botany",
issn = "0305-7364",
publisher = "Oxford University Press",
number = "1",

}

TY - JOUR

T1 - A gradient of endogenous calcium forms in mucilage of graviresponding roots of Zea mays

AU - Moore, Randy

AU - Fondren, W. Mark

PY - 1988/1/1

Y1 - 1988/1/1

N2 - Agar blocks that contacted the upper sides of tips of horizontally-oriented roots of Zea mays contain significantly less calcium (Ca) than blocks that contacted the lower sides of such roots. This gravity-induced gradient of Ca forms prior to the onset of gravicurvature, and does not form across tips of vertically-oriented roots or roots of agravitropic mutants. These results indicate that (1) Ca can be collected from mucilage of graviresponding roots, (2) gravity induces a downward movement of endogenous Ca in mucilage overlying the root tip, (3) this gravity-induced gradient of Ca does not form across tips of agravitropic roots, and (4) formation of a Ca gradient is not a consequence of gravicurvature. These results are consistent with gravity-induced movement of Ca being a trigger for subsequent redistribution of growth effectors (e.g. auxin) that induce differential growth and gravicurvature.

AB - Agar blocks that contacted the upper sides of tips of horizontally-oriented roots of Zea mays contain significantly less calcium (Ca) than blocks that contacted the lower sides of such roots. This gravity-induced gradient of Ca forms prior to the onset of gravicurvature, and does not form across tips of vertically-oriented roots or roots of agravitropic mutants. These results indicate that (1) Ca can be collected from mucilage of graviresponding roots, (2) gravity induces a downward movement of endogenous Ca in mucilage overlying the root tip, (3) this gravity-induced gradient of Ca does not form across tips of agravitropic roots, and (4) formation of a Ca gradient is not a consequence of gravicurvature. These results are consistent with gravity-induced movement of Ca being a trigger for subsequent redistribution of growth effectors (e.g. auxin) that induce differential growth and gravicurvature.

KW - Atomic absorption

KW - Calcium

KW - Corn

KW - Gravitropism (root)

KW - Zea mays

UR - http://www.scopus.com/inward/record.url?scp=0024275694&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024275694&partnerID=8YFLogxK

M3 - Article

C2 - 11538241

AN - SCOPUS:0024275694

VL - 61

SP - 113

EP - 116

JO - Annals of Botany

JF - Annals of Botany

SN - 0305-7364

IS - 1

ER -