Saltar al contenido
Merck
  • Osmotic stress represses strigolactone biosynthesis in Lotus japonicus roots: exploring the interaction between strigolactones and ABA under abiotic stress.

Osmotic stress represses strigolactone biosynthesis in Lotus japonicus roots: exploring the interaction between strigolactones and ABA under abiotic stress.

Planta (2015-02-27)
Junwei Liu, Hanzi He, Marco Vitali, Ivan Visentin, Tatsiana Charnikhova, Imran Haider, Andrea Schubert, Carolien Ruyter-Spira, Harro J Bouwmeester, Claudio Lovisolo, Francesca Cardinale
RESUMEN

Strigolactone changes and cross talk with ABA unveil a picture of root-specific hormonal dynamics under stress. Strigolactones (SLs) are carotenoid-derived hormones influencing diverse aspects of development and communication with (micro)organisms, and proposed as mediators of environmental stimuli in resource allocation processes; to contribute to adaptive adjustments, therefore, their pathway must be responsive to environmental cues. To investigate the relationship between SLs and abiotic stress in Lotus japonicus, we compared wild-type and SL-depleted plants, and studied SL metabolism in roots stressed osmotically and/or phosphate starved. SL-depleted plants showed increased stomatal conductance, both under normal and stress conditions, and impaired resistance to drought associated with slower stomatal closure in response to abscisic acid (ABA). This confirms that SLs contribute to drought resistance in species other than Arabidopsis. However, we also observed that osmotic stress rapidly and strongly decreased SL concentration in tissues and exudates of wild-type Lotus roots, by acting on the transcription of biosynthetic and transporter-encoding genes and independently of phosphate abundance. Pre-treatment with exogenous SLs inhibited the osmotic stress-induced ABA increase in wild-type roots and down-regulated the transcription of the ABA biosynthetic gene LjNCED2. We propose that a transcriptionally regulated, early SL decrease under osmotic stress is needed (but not sufficient) to allow the physiological increase of ABA in roots. This work shows that SL metabolism and effects on ABA are seemingly opposite in roots and shoots under stress.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
Acetato de etilo, anhydrous, 99.8%
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, ≥99%, FCC, FG
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, natural, ≥99%, FCC, FG
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, JIS special grade, ≥99.5%
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, SAJ first grade, ≥99.0%
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, ReagentPlus®, ≥99.8%
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, ACS reagent, ≥99.5%
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, suitable for HPLC
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, JIS 300, ≥99.5%, for residue analysis
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad
Sigma-Aldrich
Acetato de etilo, JIS 1000, ≥99.5%, for residue analysis
Número de referencia del producto (SKU)
Tamaño de envase
Disponibilidad
Precio
Cantidad