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PLANT GROWTH RESPONSES TO VESICULAR‐ARBUSCULAR MYCORRHIZA
Author(s) -
MOSSE BARBARA
Publication year - 1977
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1977.tb04831.x
Subject(s) - inoculation , rhizobia , biology , soil water , symbiosis , agronomy , mycorrhiza , microbial inoculant , dry weight , phosphorite , horticulture , fertilizer , bacteria , ecology , genetics
SUMMARY This paper reports results of inoculation with vesicular‐arbuscular (VA) endophytes in twelve unsterile soils with and without added rock phosphate or Hyperphosphat. Stylosanthes guyanensis , and in two soils also maize, were grown in pots and plant weight, P uptake, nodule weight and nitrogenase activity were measured at harvest. The introduced endophyte established well in all but one of the soils and inoculated plants with added phosphate grew best in eleven soils. Utilization of added rock phosphate was often considerably increased by inoculation but there was no evidence of increased availability. Inoculum density in the soil, rather than its phosphate status seemed to determine responses to VA inoculation, which were greatest in soils containing few indigenous endophytes. VA inoculation often stimulated nodulation by rhizobia but, in contrast to irradiated soils, there was no clear relationship between percentage plant P and nodulation. The results are discussed in relation to the possibility of field inoculation with VA endophytes.