Premium
Efficiency of the first steps of sulfate utilization by maize hybrids in relation to their productivity
Author(s) -
Saccomani M.,
Cacco G.,
Ferrari G.
Publication year - 1981
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1981.tb04117.x
Subject(s) - hybrid , chromosomal translocation , elongation , productivity , biology , sulfate , agronomy , botany , chemistry , biochemistry , gene , materials science , macroeconomics , organic chemistry , ultimate tensile strength , economics , metallurgy
The genetic variability of the efficiency of the first steps of sulfate utilization and its correlation with productivity were evaluated in nine maize hybrids. 35 SO 4 2− uptake by excised roots, uptake by intact plant roots, translocation to leaves, and ATP sulfurylase in leaves were taken into account. Uptake rate by roots of intact plants did not show any pulse within 7 to 12 days from emergence, in contrast with the previously observed behaviour of excised roots during root elongation. The uptake rate of intact plants was positively correlated with that of excised roots, but the variability within the nine genotypes tested was less. Productivity was positively correlated with sulfate uptake by both intact plant and excised roots, the level of significance being higher in the first case. Translocation to leaves and ATP sulfurylase activity were not correlated to productivity. Therefore, in the case of sulfate, the grain yield of commonly cultivated maize hybrids appeared to be controlled more by the root uptake step than by the activation and translocation steps.