Seed phosphorus remobilization is not a major limiting step for phosphorus nutrition during early growth of maize
Muhammad Nadeem
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
COMSATS Institute of Information Technology, Vehari, Pakistan
Search for more papers by this authorAlain Mollier
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorChristian Morel
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorAlain Vives
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorLoïc Prud'homme
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorSylvain Pellerin
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorMuhammad Nadeem
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
COMSATS Institute of Information Technology, Vehari, Pakistan
Search for more papers by this authorAlain Mollier
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorChristian Morel
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorAlain Vives
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorLoïc Prud'homme
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorSylvain Pellerin
INRA, UMR 1220 TCEM, 33883 Villenave d'Ornon, France
Bordeaux Sciences Agro, UMR 1220 TCEM, 33175 Gradignan, France
Search for more papers by this authorAbstract
Phosphorus (P) is the least mobile nutrient in the soil as compared to other macronutrients and therefore frequently limits crop growth. During germination and early growth, seed-phytate hydrolysis and seed-P remobilization is the major P source for developing seedlings. The objective of this paper was to investigate whether seed-P hydrolysis and remobilization of nonphytate P are sufficient for seedling P nutrition during early growth stages of maize. A large part of initial maize endogenous seed P reserves are mainly in the form of phytate. Till 70 cumulated degree days after sowing, nearly all the phytate (98%) was hydrolyzed and caused an increase in nonphytate P in seeds. Phytate hydrolysis and remobilization of nonphytate P was the main source of P supply for the newly growing seedlings and was not a limiting step for seedling P nutrition during the first four weeks of early growth.
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