Cellular compartmentation of ureide biogenesis in root nodules of cowpea (Vigna unguiculata (L.) Walp.)

Planta ◽  
1987 ◽  
Vol 172 (2) ◽  
pp. 162-175 ◽  
Author(s):  
Mary Alice Webb ◽  
E. H. Newcomb
Keyword(s):  
Vigna Unguiculata ◽  
Root Nodules ◽  
Cellular Compartmentation ◽  
Ureide Biogenesis

scholarly journals Translocation of NopP by Sinorhizobium fredii USDA257 into Vigna unguiculata Root Nodules

2010 ◽  
Vol 76 (11) ◽  
pp. 3758-3761 ◽  
Author(s):  
Lisa M. Schechter ◽  
Jeanette Guenther ◽  
Elizabeth A. Olcay ◽  
Sungchan Jang ◽  
Hari B. Krishnan
Keyword(s):  
Vigna Unguiculata ◽  
Type Iii Secretion ◽  
Root Nodules ◽  
Type Iii Secretion System ◽  
Secretion System ◽  
Dependent Manner ◽  
Nitrogen Fixing ◽  
Sinorhizobium Fredii ◽  
Type Iii

ABSTRACT Sinorhizobium fredii is a nitrogen-fixing legume symbiont that stimulates the formation of root nodules. S. fredii nodulation of roots is influenced by Nop proteins, which are secreted through a type III secretion system (T3SS). We demonstrate that S. fredii injects NopP into Vigna unguiculata nodules in a T3SS-dependent manner.

scholarly journals Effect of Different Types of Fertilization on Vigna unguiculata subsp. sesquipedalis Crop

2016 ◽  
Vol 73 (2) ◽  
pp. 217
Author(s):  
Cristina Angeli ◽  
Nicolina Cheimona ◽  
Ioanna Kakabouki ◽  
Charis Konstantina Kontopoulou ◽  
Ioanna Tabaxi ◽  
...  
Keyword(s):  
Data Analysis ◽  
Vigna Unguiculata ◽  
Conventional Treatment ◽  
Root Nodules ◽  
Morphological Characteristics ◽  
Conventional Farming ◽  
Organic Fertilization ◽  
Different Types ◽  
Yardlong Bean ◽  
Organic Compost

A field experiment was conducted at Pylos, Greece to compare the effect of different types of fertilization on yardlong bean (Vigna unguiculata subsp. sesquipedalis) crop. The conventional treatment plots were fertilized with an inorganic fertilizer, whereas the organic treatments plots received organic compost. Data analysis confirmed no significant correlation between plant height and type of fertilization, but there was significant correlation between length of pods and type of fertilization. In particular, morphological characteristics of yardlong bean were enhanced by inorganic fertilization in comparison with the organic fertilization.  Organic farming increased significantly the number on root nodules in comparison with conventional farming.

Metabolite Regulation of Phosphenolpyruvate Carboxylase in Legume Root Nodules

1996 ◽  
Vol 23 (4) ◽  
pp. 413 ◽  
Author(s):  
KC Woo ◽  
S Xu
Keyword(s):  
Nitrogen Fixation ◽  
Glycine Max ◽  
Vigna Unguiculata ◽  
Symbiotic Nitrogen Fixation ◽  
Feedback Inhibition ◽  
Root Nodules ◽  
Psophocarpus Tetragonolobus ◽  
Glycine Max L ◽  
Fructose 1,6 Bisphosphate ◽  
Metabolite Regulation

The effects of metabolic activators and inhibitors on phosphoenolpyruvate carboxylase (PEPC) activity were examined at pH 7 in partially purified enzyme from nodules of soybean (Glycine max (L.) Merr.), Psophocarpus tetragonolobus DC. and Vigna unguiculata ssp. sesquipedalis (L.) Verdc. Glucose 6-phosphate, fructose 6-phosphate, glucose 1-phosphate, fructose 1-phosphate, fructose 1,6- bisphosphate and phosphoglycerate stimulated the activity about 2-fold at low (0.5 mM) but not saturating (2.5 mM) PEP concentration. Glc 6-P and fru 6-P were the most effective activators and they increased the affinity of the enzyme for PEP by 2-4-fold. The dicarboxylates, malate, succinate, malonate, 2-oxoglutarate and aspartate inhibited PEPC activity. Malate was the most inhibitory, and strongly inhibited PEPC activity even at saturating PEP concentration. The Ki values for malate were 0.3-0.4 mM for soybean and P. tetragonolobus. However, glc 6-P and fru 6-P alleviated maiate inhibition and increased the Ki values by 11- to 28-fold in these two species. We propose that glc 6-P (fru 6-P) activates PEPC in a feedforward regulation and protects it against feedback inhibition by malate and thus coordinates the supply of photosynthate availability with malate synthesis required by the bacteroids to support symbiotic nitrogen fixation in nodules.

Specialization for ureide biogenesis in the root nodules of black locust (Robinia pseudoacacia L.), an amide exporter

PROTOPLASMA ◽  
1990 ◽  
Vol 157 (1-3) ◽  
pp. 102-111 ◽  
Author(s):  
Y. Kaneko ◽  
E. H. Newcomb
Keyword(s):  
Black Locust ◽  
Root Nodules ◽  
Robinia Pseudoacacia ◽  
Ureide Biogenesis ◽  
Robinia Pseudoacacia L

scholarly journals Differential traits of rhizobia associated to root-nodules of gum acacia (Senegalia senegal), shittah tree (Vachellia seyal), pigeon pea (Cajanus cajan L) and cowpea (Vigna unguiculata)

2020 ◽  
Vol 14 (9) ◽  
pp. 497-506
Author(s):  
Ganava Justin ◽  
Gomoung Doloum ◽  
Ngo Nkot Laurette ◽  
Takoukam Toukam Steve ◽  
Ngakou Albert
Keyword(s):  
Vigna Unguiculata ◽  
Cajanus Cajan ◽  
Root Nodules ◽  
Pigeon Pea ◽  
Gum Acacia ◽  
Senegalia Senegal

NITROGENASE ACTIVITY OF COWPEA (Vigna unguiculata (L.) Walp.) DURING AND AFTER DROUGHT STRESS

1990 ◽  
Vol 70 (1) ◽  
pp. 163-171 ◽  
Author(s):  
S. PARARAJASINGHAM ◽  
D. P. KNIEVEL
Keyword(s):  
Drought Stress ◽  
Stomatal Conductance ◽  
Water Potential ◽  
Vigna Unguiculata ◽  
Nitrogenase Activity ◽  
Root Nodules ◽  
Experimental Period ◽  
Stress Recovery ◽  
Subsequent Recovery ◽  
Per Se

Greenhouse experiments were conducted with the objectives (1) to investigate the nitrogenase activity (NA) of cowpea (Vigna unguiculata (L.) Walp.) root nodules during the development of and subsequent recovery from drought stress and (2) to determine whether the changes in NA during and following drought stress are related to nodule water potential. Nitrogenase activity of root nodules decreased by more than 80% within 6–8 d of withholding water and recovered 1 or 2 d after watering. Nodule water potential declined significantly from approximately −0.2 MPa to −0.48 MPa with 8 d of stress and recovered to prestress levels within 24 h after watering. Midday abaxial stomatal conductance decreased significantly with stress but recovered within 24 h following watering. Midday leaf water potential did not change significantly during the experimental period. Nodule NA declined 2 d before that of nodule water potential in apparent response to declining soil water content. This response and the lag in the recovery of NA following drought stress after nodule water potential had returned to prestress levels support the hypothesis that nodule water potential per se is not the primary cause for the decline in NA of cowpea root nodules during drought stress.Key words: Vigna unguiculata (L.) Walp., nitrogenase activity, drought stress, recovery, cowpea

PGPR Characterization of Non-Nodulating Bacterial Endophytes from Root Nodules of Vigna unguiculata (L.) Walp.

2019 ◽  
pp. 111-126
Author(s):  
Renzo A. Valdez-Nuñez ◽  
Rony Castro-Tuanama ◽  
Antonio Castellano-Hinojosa ◽  
Eulogio J. Bedmar ◽  
Winston F. Ríos-Ruiz
Keyword(s):  
Vigna Unguiculata ◽  
Root Nodules ◽  
Bacterial Endophytes

scholarly journals PENGARUH CEKAMAN SALINITAS GARAM NaCl TERHADAP PERTUMBUHAN KACANG TUNGGAK (Vigna unguiculata L. Walp) PADA TANAH GAMBUT

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Junandi Junandi ◽  
Mukarlina Mukarlina ◽  
Riza Linda
Keyword(s):  
Vigna Unguiculata ◽  
Sea Water ◽  
Root Nodules ◽  
Dry Weight ◽  
Cultivated Plants ◽  
Growth Disorders ◽  
Dry Land ◽  
Randomized Design ◽  
Wet Weight ◽  
Number Of Leaves

Vigna unguiculata L. Walp is one of the cultivated plants in West Borneo, usually cultivated on dry land in the dry season and can live on land that is affected by sea water intrusion. High salt levels in the soil can cause crop growth disorders. The purpose of this study was to determine the growth response of cowpea (Vigna unguiculata L. Walp) to the stress of salinity of NaCl. The study was carried out from 2019 to June 2019. Research was carried out using a Completely Randomized Design (CRD), which consisted of four treatments namely 0 ppm, 2500 ppm, 5000 ppm and 7500 ppm. The results showed a significant effect on the parameters of plant height, root length, number of leaves and wet weight, but no significant effect on the parameters of dry weight, root nodules and effective nodules.

Sign in / Sign up

Export Citation Format

Share Document