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Nitrogen Translocation and the Role of Individual Leaves in Protein Accumulation in Wheat Grain 1
Author(s) -
Mikesell Merrel E.,
Paulsen Gary M.
Publication year - 1971
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1971.0011183x001100060047x
Subject(s) - anthesis , biology , nitrogen , agronomy , chromosomal translocation , storage protein , maturity (psychological) , caryopsis , poaceae , flag (linear algebra) , horticulture , chemistry , cultivar , biochemistry , psychology , developmental psychology , organic chemistry , gene , mathematics , pure mathematics , algebra over a field
Translocation of 14 C‐labe_lled amino acids from culms to grain of high‐ and low‐protein wheat ( Triticum aestirum L .) lines during grain development was low initially after anthesis, increased at midmaturity, and decreased slightly at full maturity. Efficiency of translocation did not differ between high‐ and low‐protein lines. Total N content was similar in flag leaves and greater in lower leaves removed at anthesis from high‐protein wheat lines than from low‐protein wheat lines. Grain N content at maturity was greater in high‐protein wheat lines when no leaves were removed at anthesis. Removing flag leaf blades at anthesis had little effect on grain N content of low‐protein wheat lines, but greatly decreased N content of high‐protein wheat lines. Removing lower leaves or all leaves at anthesis decreased grain N content markedly in all lines. Nitrogen content in leaves at maturity did not differ consistently between high‐ and low‐protein lines when no leaves were removed at anthesis. Nitrogen content of mature lower leaves remaining after flag leaves were removed at anthesis was greater in low‐protein lines. When lower leaves were removed at anthesis, the remaining flag leaves contained similar amounts of N at maturity in all wheat lines.