Arbuscular mycorrhizal fungi enhance tolerance of Rosa multiflora cv. burr to bicarbonate in irrigation water

被引:30
作者
Cartmill, Andrew D.
Alarcon, Alejandro
Valdez-Aguilar, Luis A.
机构
[1] USDA ARS, US Salin Lab, Riverside, CA 92507 USA
[2] Colegio Postgrad, Area Microbiol, Montecillo, Estado Mexico, Mexico
[3] Texas A&M Univ, Dept Hort Sci, College Stn, TX 77843 USA
关键词
alkalinity; acid phosphatase (ACP); alkaline phosphatase (ALP); iron (Fe); iron reductase; phosphorus (P); plant nutrition;
D O I
10.1080/01904160701556802
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
High bicarbonate (HCO3-) of irrigation water can be detrimental to plant growth in sustainable horticultural production systems. The ability of arbuscular mycorrhizal fungi (AMF), ZAC-19, (composed of Glomus albidum, Glomus claroideum, and Glomus diaphanum) to enhance tolerance to HCO3- was tested on Rosa multiflora cv. Burr. Arbuscular mycorrhizal colonized and non-inoculated (non-AMF) plants were treated with 0, 2.5, 5, and 10 mM HCO3-. Increasing HCO3- concentration and associated high pH and electrical conductivity (EC) - reduced plant growth, nutrient uptake, and acid phosphatase activity, while increasing alkaline phosphatase activity (ALP). Inoculation with AMF enhanced plant tolerance to HCO3-, as indicated by greater growth (leaf, stem, and total plant dry weight, leaf area and leaf area ratio), leaf elemental concentration [nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), iron (Fe), zinc (Zn), aluminum (Al), boron (13)], leaf chlorophyll concentration, higher mycorrhizal inoculation effect, lower root Fe reductase activity, and generally lower soluble ALP activity. While AMF colonization was reduced by increasing HCO3- concentration, colonization still occurred at high HCO3- concentration. At 2.5 mM HCO3-, AMF plant growth was comparable to plants at 0 mM HCO3-, further indicating the beneficial effect of AMF for alleviation of HCO3- plant stress.
引用
收藏
页码:1517 / 1540
页数:24
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