Matches in SemOpenAlex for { <https://semopenalex.org/work/W1992735351> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W1992735351 endingPage "278" @default.
- W1992735351 startingPage "269" @default.
- W1992735351 abstract "The gas exchange characteristics of intact attached nodulated roots of pea (Pisum sativum cv. Finale X) and lupin (Lupinus albus cv. Ultra) were studied under a number of environmental conditions to determine whether or not the nodules regulate resistance to oxygen diffusion. Nitrogenase activity (H2 evolution) in both species was inhibited by an increase in rhizosphere pO2 from 20% to 30%, but recovered within 30 min without a significant increase in nodulated root respiration (CO2 evolution). These data suggest that the nodules possess a variable barrier to O2 diffusion. Also, nitrogenase activity in both species declined when the roots were either exposed to an atmosphere of Ar:O2 or when the shoots of the plants were excised. These declines could be reversed by elevating rhizosphere pO2, indicating that the inhibition of nitrogenase activity resulted from an increase in gas diffusion resistance and consequent O2-limitation of nitrogenase-linked respiration. These results indicate that nodules of pea and lupin regulate their internal O2 concentration in a manner similar to nodules of soybean, despite the distinct morphological and biochemical differences that exist between the nodules of the 3 species. Experiments in which total nitrogenase activity (TNA = H2 production in Ar:O2) in pea and lupin nodules was monitored while rhizosphere pO2 was increased gradually to 100%, showed that the resistance of the nodules to O2 diffusion maintains nitrogenase activity at about 80% of its potential activity (PNA) under normal atmospheric conditions. The O2-limitation coefficient of nitrogenase (OLCN= TNA/PNA) declined significantly with prolonged exposure to Ar:O2 or with shoot excision. Together, these results indicate a significant degree of O2-limitation of nitrogenase activity in pea and lupin nodules, and that yields may be increased by realizing full potential activity." @default.
- W1992735351 created "2016-06-24" @default.
- W1992735351 creator A5035095953 @default.
- W1992735351 creator A5059533322 @default.
- W1992735351 creator A5083932591 @default.
- W1992735351 date "1992-10-01" @default.
- W1992735351 modified "2023-09-27" @default.
- W1992735351 title "O2 regulation and O2 -limitation of nitrogenase activity in root nodules of pea and lupin" @default.
- W1992735351 doi "https://doi.org/10.1034/j.1399-3054.1992.860212.x" @default.
- W1992735351 hasPublicationYear "1992" @default.
- W1992735351 type Work @default.
- W1992735351 sameAs 1992735351 @default.
- W1992735351 citedByCount "21" @default.
- W1992735351 countsByYear W19927353512016 @default.
- W1992735351 countsByYear W19927353512019 @default.
- W1992735351 crossrefType "journal-article" @default.
- W1992735351 hasAuthorship W1992735351A5035095953 @default.
- W1992735351 hasAuthorship W1992735351A5059533322 @default.
- W1992735351 hasAuthorship W1992735351A5083932591 @default.
- W1992735351 hasConcept C126574351 @default.
- W1992735351 hasConcept C141280058 @default.
- W1992735351 hasConcept C144027150 @default.
- W1992735351 hasConcept C181440489 @default.
- W1992735351 hasConcept C182215343 @default.
- W1992735351 hasConcept C21410773 @default.
- W1992735351 hasConcept C2775997218 @default.
- W1992735351 hasConcept C2776959544 @default.
- W1992735351 hasConcept C2779535332 @default.
- W1992735351 hasConcept C523546767 @default.
- W1992735351 hasConcept C54355233 @default.
- W1992735351 hasConcept C59822182 @default.
- W1992735351 hasConcept C86626682 @default.
- W1992735351 hasConcept C86803240 @default.
- W1992735351 hasConcept C87225578 @default.
- W1992735351 hasConceptScore W1992735351C126574351 @default.
- W1992735351 hasConceptScore W1992735351C141280058 @default.
- W1992735351 hasConceptScore W1992735351C144027150 @default.
- W1992735351 hasConceptScore W1992735351C181440489 @default.
- W1992735351 hasConceptScore W1992735351C182215343 @default.
- W1992735351 hasConceptScore W1992735351C21410773 @default.
- W1992735351 hasConceptScore W1992735351C2775997218 @default.
- W1992735351 hasConceptScore W1992735351C2776959544 @default.
- W1992735351 hasConceptScore W1992735351C2779535332 @default.
- W1992735351 hasConceptScore W1992735351C523546767 @default.
- W1992735351 hasConceptScore W1992735351C54355233 @default.
- W1992735351 hasConceptScore W1992735351C59822182 @default.
- W1992735351 hasConceptScore W1992735351C86626682 @default.
- W1992735351 hasConceptScore W1992735351C86803240 @default.
- W1992735351 hasConceptScore W1992735351C87225578 @default.
- W1992735351 hasIssue "2" @default.
- W1992735351 hasLocation W19927353511 @default.
- W1992735351 hasOpenAccess W1992735351 @default.
- W1992735351 hasPrimaryLocation W19927353511 @default.
- W1992735351 hasRelatedWork W1480884050 @default.
- W1992735351 hasRelatedWork W1969633383 @default.
- W1992735351 hasRelatedWork W1990574748 @default.
- W1992735351 hasRelatedWork W2011972653 @default.
- W1992735351 hasRelatedWork W2022945161 @default.
- W1992735351 hasRelatedWork W2028282592 @default.
- W1992735351 hasRelatedWork W2031925992 @default.
- W1992735351 hasRelatedWork W2033487174 @default.
- W1992735351 hasRelatedWork W2036717280 @default.
- W1992735351 hasRelatedWork W2039487565 @default.
- W1992735351 hasRelatedWork W2047041195 @default.
- W1992735351 hasRelatedWork W2061237311 @default.
- W1992735351 hasRelatedWork W2066875738 @default.
- W1992735351 hasRelatedWork W2069374208 @default.
- W1992735351 hasRelatedWork W2070847218 @default.
- W1992735351 hasRelatedWork W2081992104 @default.
- W1992735351 hasRelatedWork W2107227533 @default.
- W1992735351 hasRelatedWork W2118279631 @default.
- W1992735351 hasRelatedWork W2401894818 @default.
- W1992735351 hasRelatedWork W2475983962 @default.
- W1992735351 hasVolume "86" @default.
- W1992735351 isParatext "false" @default.
- W1992735351 isRetracted "false" @default.
- W1992735351 magId "1992735351" @default.
- W1992735351 workType "article" @default.