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COBALT REQUIREMENT FOR NODULE DEVELOPMENT AND FUNCTION IN LUPINUS ANGUSTIFOLIUS L.
Author(s) -
RILEY IAN T.,
DILWORTH M. J.
Publication year - 1985
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.1469-8137.1985.tb02784.x
Subject(s) - lupinus angustifolius , leghemoglobin , cobalt , nodule (geology) , biology , root nodule , botany , lupinus , acetylene , yield (engineering) , symbiosis , horticulture , agronomy , chemistry , materials science , bacteria , inorganic chemistry , paleontology , genetics , organic chemistry , metallurgy
S ummary The cobalt requirement for nodule development and function in Lupinus angustifolius L. ev. Uniharvest was studied in a glasshouse using a range of cobalt applications. Nodule establishment was found to be limited only by severe cobalt limitation. Bacteroid content of the nodules was the main determinant of nodule function and thus plant performance. Leghaemoglobin synthesis appeared to be more sensitive to cobalt limitation but was a less significant determinant of acetylene reduction activity. The critical root cobalt level for the normal symbiosis was 500 ng Co g −1 d. wt but a level of 300 ng Co g −1 d. wt resulted in no yield loss since there was a compensatory increase in lateral nodulation.