HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (105) Citing Articles via Google Scholar Google Scholar Articles by Malinowski, D. P. Articles by Belesky, D. P. Search for Related Content PubMed Articles by Malinowski, D. P. Articles by Belesky, D. P. Agricola Articles by Malinowski, D. P. Articles by Belesky, D. P.

Adaptations of Endophyte-Infected Cool-Season Grasses to Environmental Stresses

Mechanisms of Drought and Mineral Stress Tolerance

^a Texas A&M Univ., Texas Agric. Exp. Stn., P.O.B. 1658, Vernon, TX 76385 USA
^b USDA-ARS, Appalachian Farming Systems Research Center, 1224 Airport Rd., Beaver, WV 25813 USA

View larger version (20K): [in a new window]   Fig. 1 Relative yield total (RYT) of red clover and endophyte-infected (E+) and noninfected (E-) tall fescue genotypes DN2 and DN11 grown in binary mixtures. When endophyte-infected, the concentration of loline alkaloids in roots of DN2 was twice that of DN11, indicating a possible allelopathic effects on red clover. Adapted from Malinowski et al. (1999a)

View larger version (16K): [in a new window]   Fig. 2 Root and shoot DM of endophyte-infected (E+) and noninfected (E-) tall fescue (averaged over four genotypes) as a function of soil P availability. Adapted from Malinowski et al. (1998b)

View larger version (23K): [in a new window]   Fig. 3 Concentrations of P, Mg, and Ca in roots and shoots of endophyte-infected (E+) and noninfected (E-) tall fescue (averaged over four genotypes) as a function of soil P availability. Adapted from Malinowski et al. (1998b)

View larger version (19K): [in a new window]   Fig. 4 Root DM of tall fescue genotypes DN2 and DN4 grown in a P-deficient soil supplied with phosphate rock (PR) and in vitro P solubility (from PR) by tall fescue root exudates in response to infection with the leaf fungal endophyte, N. coenophialum (E-, noninfected; E+, infected). Adapted from Malinowski and Belesky (1999a)

View larger version (18K): [in a new window]   Fig. 5 Root diameter and root hair length of tall fescue (averaged over genotypes DN2 and DN4) grown in P-deficient and P-sufficient nutrient solution as a function of endophyte infection (E-, noninfected; E+, infected). Adapted from Malinowski et al. (1999b)

View larger version (23K): [in a new window]   Fig. 6 Fe3+ reducing activity of exudates from intact roots of tall fescue (averaged over genotypes DN2, DN4, DN7, and DN11) in response to endophyte infection (E-, noninfected; E+, infected) and P availability in the growth medium during a 24-h measurement cycle. Adapted from Malinowski et al. (1998a)

View larger version (24K): [in a new window]   Fig. 7 Concentrations of water soluble (W) and ethanol:water (50:50 v/v) soluble phenolic compounds (EW) in roots and shoots of endophyte-infected (E+) and noninfected (E-) tall fescue (averaged over genotypes DN2, DN4, DN7, and DN11) as a function of P availability in the growth medium. Adapted from Malinowski et al. (1998a)

View larger version (19K): [in a new window]   Fig. 8 Relationship between root DM and amount of Al desorbed from root surfaces of tall fescue (averaged over genotypes DN2 and DN4) as a function of endophyte infection (E-, noninfected; E+, infected). Adapted from Malinowski and Belesky (1999b)