Changes of enzyme activities in leaves of lucerne Medicago sativa L. cv. Lodi sown in different years
1997
Astolfi, S. | Biasi, M.G. de | Luna, M. | Passera, C. (Universita della Tuscia, Viterbo (Italy). Dipartimento di Agrobiologia ed Agrochimica)
إنجليزي. Chlorophyll and protein content and the activities of ribulose 1, 5 biphosphate carboxylase (RuBPc; EC 4.1.1.39), phosphoenolpyruvate carboxylase (PEPc: EC 1.1,1.31), glycolate oxidase (GO; EC 1.1.3,1), glutamine synthetase (GS; EC 6.3.1.2), and glutamate dehydrogenase (GDH; EC 1.4.1.2) were determined in apical and basal leaves from Lucerne (Medicago sativa L., cv. Lodi) sown in different years (1993, 1994, 1995). All the determined parameters were found significantly higher in apical leaves than in basal ones. Furthermore, those parameters diminished in apical leaves, whereas decreased in basal ones as sowing year increased. Results indicate that the metabolic activities of Lucerne are constant during its life cycle and suggest a possible compensatory role of basal leaves in C and N assimilatory processes
اظهر المزيد [+] اقل [-]إيطالي. Nelle foglie apicali e basali di piante di erba medica (Medicago sativa L., cv. Lodi), seminate in anni differenti (1993, 1994, 1995) sono stati determinati il contenuto di proteine e di clorofilla, e le attivita' della ribulosio bifosfato carbossilasi (RuBPc: EC 4,1.1.39), fosfoenolpiruvico carbossilasi (PEPc: EC 4.1.1,311, glicolico ossidasi (GO. EC 1.1.3.1), glutammina sintetasi (GS: EC 6.3.1.2), glutammato deidrogenasi (GDH; EC 1.4.1.2). I risultati dimostrano che la pianta di erba medica: a) tende a mantenere costanti le sue attivita' metaboliche durante il ciclo vitale; (b) compie la maggior parte delle sue attivita' assimilative (C e N) attraverso le foglie apicali. Tuttavia, con l'aumentare dell'anno di semina, il ruolo preponderante delle foglie apicali diminuisce, mentre aumenta quello delle foglie basali
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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