scholarly journals GlnR and PhoP regulate β-glucosidases involved in cellulose digestion in response to nitrogen and phosphate availability

Microbiology ◽  
2018 ◽  
Vol 164 (5) ◽  
pp. 779-789 ◽  
Author(s):  
Ya Xu ◽  
Bang-Ce Ye
Keyword(s):  
Cellulose Digestion ◽  
Phosphate Availability

Factors Influencing in Vitro Rumen Cellulose Digestion

1956 ◽  
Vol 15 (4) ◽  
pp. 1180-1187 ◽  
Author(s):  
C. N. Huhtanen ◽  
R.F. Elliott
Keyword(s):  
Cellulose Digestion ◽  
Factors Influencing

scholarly journals Cellulose digestion by freshwater microcrustacea1

1984 ◽  
Vol 29 (5) ◽  
pp. 1132-1136 ◽  
Author(s):  
Steven A. Schoenberg ◽  
Alexander E. Maccubbin ◽  
Robert E. Hodson
Keyword(s):  
Cellulose Digestion

scholarly journals Environmental controls on the <i>Emiliania huxleyi</i> calcite mass

2014 ◽  
Vol 11 (8) ◽  
pp. 2295-2308 ◽  
Author(s):  
M. T. Horigome ◽  
P. Ziveri ◽  
M. Grelaud ◽  
K.-H. Baumann ◽  
G. Marino ◽  
...  
Keyword(s):  
Seawater Temperature ◽  
World Ocean ◽  
Environmental Parameters ◽  
Abundant Species ◽  
Emiliania Huxleyi ◽  
Ion Concentration ◽  
Carbonate Chemistry ◽  
Environmental Controls ◽  
Carbonate Ion ◽  
Phosphate Availability

Abstract. Although ocean acidification is expected to impact (bio) calcification by decreasing the seawater carbonate ion concentration, [CO32−], there is evidence of nonuniform response of marine calcifying plankton to low seawater [CO32−]. This raises questions about the role of environmental factors other than acidification and about the complex physiological responses behind calcification. Here we investigate the synergistic effect of multiple environmental parameters, including seawater temperature, nutrient (nitrate and phosphate) availability, and carbonate chemistry on the coccolith calcite mass of the cosmopolitan coccolithophore Emiliania huxleyi, the most abundant species in the world ocean. We use a suite of surface (late Holocene) sediment samples from the South Atlantic and southwestern Indian Ocean taken from depths lying above the modern lysocline (with the exception of eight samples that are located at or below the lysocline). The coccolith calcite mass in our results presents a latitudinal distribution pattern that mimics the main oceanographic features, thereby pointing to the potential importance of seawater nutrient availability (phosphate and nitrate) and carbonate chemistry (pH and pCO2) in determining coccolith mass by affecting primary calcification and/or the geographic distribution of E. huxleyi morphotypes. Our study highlights the importance of evaluating the combined effect of several environmental stressors on calcifying organisms to project their physiological response(s) in a high-CO2 world and improve interpretation of paleorecords.

Inhibition of Rumen Cellulose Digestion by Extracts of Sericea Lespedeza

1967 ◽  
Vol 26 (3) ◽  
pp. 632-637 ◽  
Author(s):  
S. J. Lyford ◽  
W. W. G. Smart ◽  
T. A. Bell
Keyword(s):  
Sericea Lespedeza ◽  
Cellulose Digestion

scholarly journals Identification of an isoflavonoid transporter required for the nodule establishment of the Rhizobium-Fabaceae symbiotic interaction

2021 ◽  
Author(s):  
Wanda Biala-Leonhard ◽  
Laura Zanin ◽  
Stefano Gottardi ◽  
Rita de Brito Francisco ◽  
Silvia Venuti ◽  
...  
Keyword(s):  
Functional Characterization ◽  
Crop Productivity ◽  
Signaling Cascades ◽  
Nutritional Deficiencies ◽  
White Lupin ◽  
Symbiotic Interaction ◽  
Phosphate Availability ◽  
Rhizobial Symbiosis

Nitrogen (N) as well as Phosphorus (P) are key nutrients determining crop productivity. Legumes have developed strategies to overcome nutrient limitation by e.g., forming a symbiotic relationship with N-fixing rhizobia and the release of P-mobilizing exudates and are thus able to grow without supply of N or P fertilizers. The legume-rhizobial symbiosis starts with root release of isoflavonoids, that act as signaling molecules perceived by compatible bacteria. Subsequently, bacteria release nod factors, which induce signaling cascades allowing the formation of functional N-fixing nodules. We report here the identification and functional characterization of a plasma membrane-localized MATE-type transporter (LaMATE2) involved in the release of genistein from white lupin roots. The LaMATE2 expression in the root is upregulated under N deficiency as well as low phosphate availability, two nutritional deficiencies that induce the release of this isoflavonoid. LaMATE2 silencing reduced genistein efflux and even more the formation of symbiotic nodules, supporting the crucial role of LaMATE2 in isoflavonoid release and nodulation. Furthermore, silencing of LaMATE2 limited the P-solubilization activity of lupin root exudates. Transport assays in yeast vesicles demonstrated that LaMATE2 acts as a proton-driven isoflavonoid transporter.

Sign in / Sign up

Export Citation Format

Share Document