Partitioning mycorrhizal influence on water relations of Phaseolus vulgaris into soil and plant components

Robert M. Augé, David M. Sylvia, Soon Park, Brian R. Buttery, Arnold M. Saxton, Jennifer L. Moore, Keunho Cho

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

There is growing appreciation of arbuscular mycorrhizal effects on soil properties and their potential consequences on plant behavior. We examined the possibility that mycorrhizal soil may directly influence plant water relations. Using wild-type and noncolonizing bean mutants planted into soils previously produced using mycorrhizal or nonmycorrhizal sorghum plants, we partitioned mycorrhizal influence on stomatal conductance and drought resistance into soil and root components, testing whether effects of mycorrhizal fungi occurred mostly via mycorrhization of roots, mycorrhization of soil, or both. The mutation itself had no effect on any water relations parameter. Colonization by Gigaspora margarita Gerdemann & Trappe and Glomus intraradices Schenck & Smith had appreciable effects on leaf water potential at the lethal point and on osmotic adjustment, relative to nonmycorrhizal plants of comparable size. Mycorrhizal effects on drought resistance were attributable to an effect on the plant itself rather than to an effect of mycorrhizal soil. Mycorrhizal effects on stomatal conductance were attributable to mycorrhization of both roots and soil, as well as to mycorrhization of roots alone. Surprisingly, merely growing in a mycorrhizal soil resulted in promotion of stomatal conductance of nonmycorrhizal plants in both amply watered and draughted plants. Mycorrhizal effects on draughted plants did not appear to be related to altered soil water retention properties, as Gigaspora margarita and Glomus intraradices altered the soil's moisture characteristic curve only slightly.

Original languageEnglish (US)
Pages (from-to)503-514
Number of pages12
JournalCanadian Journal of Botany
Volume82
Issue number4
DOIs
StatePublished - Apr 1 2004

Fingerprint

water relations
Phaseolus vulgaris
partitioning
mycorrhizae
soil
Gigaspora margarita
water
stomatal conductance
Glomus intraradices
drought resistance
drought tolerance
soil water retention
plant-water relations
plant water relations
plant component
effect
leaf water potential
lethal genes
mycorrhizal fungi
soil properties

All Science Journal Classification (ASJC) codes

  • Plant Science

Cite this

Augé, R. M., Sylvia, D. M., Park, S., Buttery, B. R., Saxton, A. M., Moore, J. L., & Cho, K. (2004). Partitioning mycorrhizal influence on water relations of Phaseolus vulgaris into soil and plant components. Canadian Journal of Botany, 82(4), 503-514. https://doi.org/10.1139/b04-020
Augé, Robert M. ; Sylvia, David M. ; Park, Soon ; Buttery, Brian R. ; Saxton, Arnold M. ; Moore, Jennifer L. ; Cho, Keunho. / Partitioning mycorrhizal influence on water relations of Phaseolus vulgaris into soil and plant components. In: Canadian Journal of Botany. 2004 ; Vol. 82, No. 4. pp. 503-514.
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Augé, RM, Sylvia, DM, Park, S, Buttery, BR, Saxton, AM, Moore, JL & Cho, K 2004, 'Partitioning mycorrhizal influence on water relations of Phaseolus vulgaris into soil and plant components', Canadian Journal of Botany, vol. 82, no. 4, pp. 503-514. https://doi.org/10.1139/b04-020

Partitioning mycorrhizal influence on water relations of Phaseolus vulgaris into soil and plant components. / Augé, Robert M.; Sylvia, David M.; Park, Soon; Buttery, Brian R.; Saxton, Arnold M.; Moore, Jennifer L.; Cho, Keunho.

In: Canadian Journal of Botany, Vol. 82, No. 4, 01.04.2004, p. 503-514.

Research output: Contribution to journalArticle

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