INVESTIGADORES
GARRIZ Andres
congresos y reuniones científicas
Título:
Developmental responses and transcriptomic reprogramming in Lotuns japonicus under alkaline stress
Autor/es:
BABUIN, MARIA FLORENCIA; ESCARAY F; A GÁRRIZ; BORDENAVE C; CAMPESTRE MP; MENENDEZ AB; ANTONELLI C; OA RUIZ
Lugar:
San Luis
Reunión:
Congreso; 47th Annual Meeting Argentine Society for Biochemistry and Molecular Biology; 2011
Institución organizadora:
Argentine Society for Biochemistry and Molecular Biology
Resumen:
Plant growth is affected in alkaline soils (associated with highconcentrations of carbonates) due to a diminution of nutrientavailability. It has been shown that many agronomic importantlegumes, as some species from the genus Lotus, are able to cope withthis stress and grow in affected regions. A thorough understanding ofthe tolerance determinants is crucial for the generation of moreresistant cultivars. However, the mechanisms involved in alkalinetolerance in these species remain still unknown. In order to add morelight to our current knowledge on this field, we evaluated the effectof alkalinity in the development and molecular responses of twoecotypes of the model legume Lotus japonicus. Interestingly, wefound that the ecotype MG-20 was completely tolerant to the stressconditions imposed in our assays, with no evident symptoms and allthe plants reaching the reproductive stage. On the other hand, theecotype Gifu was severely affected by alkalinity leading to leafchlorosis and high rate of plant death. Global gene expression in leafand root samples identified several genes with probable roles instress tolerance, many of them being different transcription factorsand protein kinases that might regulate and coordinate cellresponses. The importance of these genes and the similarities withpreviously published reports are discussed.