Mobilization of sparingly soluble inorganic phosphates by the external mycelium of an abuscular mycorrhizal fungus

被引:77
作者
Yao, Q [1 ]
Li, XL [1 ]
Feng, G [1 ]
Christie, P [1 ]
机构
[1] Queens Univ Belfast, Dept Agr & Environm Sci, Belfast BT9 5PX, Antrim, North Ireland
基金
中国国家自然科学基金;
关键词
arbuscular mycorrhiza; external hyphae; P mobilization; sparingly soluble phosphate;
D O I
10.1023/A:1010367501363
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Red clover (Trifolium pratense L.) and Glomus versiforme (Karsten) Berch growing in rhizoboxes were employed in two glasshouse experiments to study the mobilization of sparingly soluble phosphates by arbuscular mycorrhizal fungal (AMF) mycelium. In one experiment, four inorganic sources of phosphate, CaHPO(4). 2H(2)O (Ca(2)-P), Ca(8)H(2)(PO(4))(6). 5H(2)O (Ca(8)-P), Ca(10)(PO(4))(6).F(2) (Ca(10)-P) and AlPO(4). nH(2)O (Al-P), were chemically synthesized, labelled with (32)P in an atomic pile and applied to the hyphal compartments of the rhizoboxes. Shoot yield, (3)2P and total P uptake were measured in clover growing in the root compartments. A similar experiment was conducted simultaneously using the same phosphate sources unlabelled and clover mycorrhizal infection and soil pH were determined. Although AMF inoculation increased the P uptake and biomass of clover shoots, the contribution of AMF to shoot P uptake and biomass varied with phosphate source, and was greatest with Ca(2)-P and least with Ca(10)-P. (3)2P measurements indicated that external hyphae could mobilize Ca(2)-P, Ca(8)-P and Al-P, but not Ca(10)-P. This indicates that AMF not only mobilize the same types of phosphates that plants mobilize under stress conditions of low P, but give increased contact with phosphates in the soil compared with non-mycorrhizal root systems.
引用
收藏
页码:279 / 285
页数:7
相关论文
共 23 条
[1]  
Baligar VC, 1990, CROPS ENHANCERS NUTR, P351
[2]   MYCORRHIZAL RESPONSES OF BARLEY CULTIVARS DIFFERING IN P-EFFICIENCY [J].
BAON, JB ;
SMITH, SE ;
ALSTON, AM .
PLANT AND SOIL, 1993, 157 (01) :97-105
[3]   YIELD RESPONSES BY MODERN WHEAT GENOTYPES TO PHOSPHATE FERTILIZER AND THEIR IMPLICATIONS FOR BREEDING [J].
BATTEN, GD ;
KHAN, MA ;
CULLIS, BR .
EUPHYTICA, 1984, 33 (01) :81-89
[4]   A CRITICAL-REVIEW ON THE ROLE OF MYCORRHIZAL FUNGI IN THE UPTAKE OF PHOSPHORUS BY PLANTS [J].
BOLAN, NS .
PLANT AND SOIL, 1991, 134 (02) :189-207
[5]   SPECIFIC ACTIVITY OF PHOSPHORUS IN MYCORRHIZAL AND NON-MYCORRHIZAL PLANTS IN RELATION TO THE AVAILABILITY OF PHOSPHORUS TO PLANTS [J].
BOLAN, NS ;
ROBSON, AD ;
BARROW, NJ ;
AYLMORE, LAG .
SOIL BIOLOGY & BIOCHEMISTRY, 1984, 16 (04) :299-304
[6]   KINETICS OF PHOSPHORUS ABSORPTION BY MYCORRHIZAL AND NON-MYCORRHIZAL TOMATO ROOTS [J].
CRESS, WA ;
THRONEBERRY, GO ;
LINDSEY, DL .
PLANT PHYSIOLOGY, 1979, 64 (03) :484-487
[7]   COMPARISON OF PHOSPHATASE LOCALIZATION IN THE INTRARADICAL HYPHAE OF ARBUSCULAR MYCORRHIZAL FUNGI, GLOMUS SPP AND GIGASPORA SPP [J].
EZAWA, T ;
SAITO, M ;
YOSHIDA, T .
PLANT AND SOIL, 1995, 176 (01) :57-63
[8]  
*GENSTAT COMM, 1993, GENSTAT REL 3 REF MA
[9]   AN EVALUATION OF TECHNIQUES FOR MEASURING VESICULAR ARBUSCULAR MYCORRHIZAL INFECTION IN ROOTS [J].
GIOVANNETTI, M ;
MOSSE, B .
NEW PHYTOLOGIST, 1980, 84 (03) :489-500
[10]  
GUO ZF, 1993, 2 INT S MAT CYCL PED, P292