Abstract
Cowpea is a very important crop to Brazilian Semi-Arid mainly small family-based farmers. Rhizobia inoculation is a practice, easy to use, and cheap technology that increases cowpea productivity. The aim of this study was to evaluate the efficiency of two new rhizobia isolates in greenhouse and field as well as classify them taxonomically. To bacterial identification the 16S rRNA gene of ESA 17 and ESA 18 isolates were sequenced. The greenhouse test was conducted with pots containing 3 L of soil and the bacterial isolates evaluated were ESA 17, ESA 18, BR 3267 or BR 3262 strains. A field experiment was implemented on a Vertisol in Juazeiro, Bahia State, to evaluate the cowpea growth and productivity. In this experiment, the peat-based inoculants with ESA 17, ESA 18, BR 3267 or UFLA 3-84 were used in 2 cowpea cultivars. Both bacteria were identified as Bradyrhizobium, but related to different species. ESA 17 was related to B. japonicum and ESA 18 was closer to B. pachyrhizi. At greenhouse, both isolates increased cowpea nitrogen content in the shoots due to the presence of very efficient nodules. In the field, the isolate ESA 18 inoculated at BRS Pujante cultivar induced higher production than observed for the absolute control, and for BR 17 Gurguéia cultivar, the ESA 17 and BR 3267 stood out both by inducing high production and grain protein content. The results indicate that both isolates can be evaluated in network experiments aiming at official recommendation for new bacteria to cowpea inoculant in Brazil.
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Claims 6
Claim · model-written summary
ESA 17 was related to B. japonicum.
- Taxon
- cowpea
Vigna unguiculatat0 - Interactor
- B. japonicum
Bradyrhizobium japonicume0symbiont - Outcome
- ESA 17 was related to B. japonicume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea”
e0“ESA 17 was related to B. japonicum”
Claim · model-written summary
ESA 18 was closer to B. pachyrhizi.
- Taxon
- cowpeaVigna unguiculatat0
- Interactor
- B. pachyrhiziBradyrhizobium pachyrhizie0symbiont
- Outcome
- ESA 18 was closer to B. pachyrhizie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea”
e0“ESA 18 was closer to B. pachyrhizi”
Claim · model-written summary
Both isolates increased cowpea shoot nitrogen content in the greenhouse.
- Taxon
- cowpeaVigna unguiculatae0
- Organ / stage
- shootse0
- Treatment
- both isolatese0
- Outcome
- nitrogen content in the shootse0
- Direction
- increasede0
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At greenhouse, both isolates increased cowpea nitrogen content in the shoots due to the presence of very efficient nodules”
Claim · model-written summary
ESA 18 increased production of BRS Pujante relative to the absolute control in the field.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BRS Pujante cultivare0
- Treatment
- ESA 18 inoculatede0
- Interactor
- ESA 18e0symbiont
- Outcome
- productione0
- Direction
- highere0
- Comparator
- absolute controle0
- Setting
- fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea”
e0“In the field, the isolate ESA 18 inoculated at BRS Pujante cultivar induced higher production than observed for the absolute control”
Claim · model-written summary
ESA 17 induced high production and grain protein content in BR 17 Gurguéia.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BR 17 Gurguéia cultivare0
- Treatment
- ESA 17e0
- Interactor
- ESA 17e0symbiont
- Outcome
- high production and grain protein contente0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea”
e0“for BR 17 Gurguéia cultivar, the ESA 17 and BR 3267 stood out both by inducing high production and grain protein content”
Claim · model-written summary
BR 3267 induced high production and grain protein content in BR 17 Gurguéia.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- BR 17 Gurguéia cultivare0
- Treatment
- BR 3267e0
- Interactor
- BR 3267e0symbiont
- Outcome
- high production and grain protein contente0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cowpea”
e0“for BR 17 Gurguéia cultivar, the ESA 17 and BR 3267 stood out both by inducing high production and grain protein content”
The same questions in other papers
inoculation · yield · Vigna unguiculata (cowpea)Results differ
98 papers in the same direction as this paper · 16 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- positive
112 papers more in this group
See all 116 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.