Promotion of acetylene reduction by Rhizobium-soybean cell associations in vitro.
نویسنده
چکیده
Nitrogenase activity, determined by the acetylene reduction assay, in soybean cell suspensions infected with Rhizobium, was stimulated significantly by the addition of succinic acid or glutamine. Acetylene-dependent ethylene values as high as 4.6 mumoles of ethylene/gram dry weight.hour were observed.
منابع مشابه
Utilization of aldehydes and alcohols by soybean bacteroids.
Aldehydes, alcohols and acids were tested for their ability to support acetylene reduction and oxygen consumption by Rhizobium japonicum bacteroids isolated from soybean nodules. Several alcohols and aldehydes increased acetylene reduction and oxygen uptake. This is consistent with the concept that the plant nodule cytosol can metabolize carbohydrate via anaerobic fermentative pathways.
متن کاملA simple technique for the establishment of nitrogenase in soybean callus culture.
A nitrogen-fixing association can be readily established in vitro between Rhizobium and cultured soybean root cells. Plant cells are grown as a thin callus on the surface of solid defined medium containing low levels of inorganic nitrogen and inoculated with bacteria during the active phase of growth. Acetylene reduction activities up to 275 nmoles ethylene/hr.g dry weight of cells have been re...
متن کاملEnzymes of ammonia assimilation and ureide biosynthesis in soybean nodules: effect of nitrate.
The effect of nitrate on N(2) fixation and the assimilation of fixed N(2) in legume nodules was investigated by supplying nitrate to well established soybean (Glycine max L. Merr. cv Bragg)-Rhizobium japonicum (strain 3I1b110) symbioses. Three different techniques, acetylene reduction, (15)N(2) fixation and relative abundance of ureides ([ureides/(ureides + nitrate + alpha-amino nitrogen)] x 10...
متن کاملSoluble aldehyde dehydrogenase and metabolism of aldehydes by soybean bacteroids.
A soluble aldehyde dehydrogenase (EC 1.2.1.3) was partially purified from Rhizobium japonicum bacteroids and from free-living R. japonicum 61A76. The enzyme was activated by NAD+, NADH, and dithiothreitol, and it reduced NAD(P)+. Acetaldehyde, propionaldehyde, butyraldehyde, benzaldehyde, and succinic semialdehyde were substrates. The Km for straight-chain aldehydes decreased with increasing ca...
متن کاملThe Relationship between H(2) Evolution and Acetylene Reduction in Pisum sativum-Rhizobium leguminosarum Symbioses Differing in Uptake Hydrogenase Activity.
Peas (Pisum sativum L.) were inoculated with strains of Rhizobium leguminosarum having different levels of uptake hydrogenase (Hup) activity and were grown in sterile Leonard jars under controlled conditions. Rates of H(2) evolution and acetylene reduction were determined for intact nodulated roots at intervals after the onset of darkness or after removal of the shoots. Hup activity was estimat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Plant physiology
دوره 54 4 شماره
صفحات -
تاریخ انتشار 1974