IBAM   22618
INSTITUTO DE BIOLOGIA AGRICOLA DE MENDOZA
Unidad Ejecutora - UE
artículos
Título:
Phytochrome B enhances photosynthesis at the expense of water use efficiency in Arabidopsis
Autor/es:
BOCCALANDRO, HE; RUGNONE, M.; MORENO, J; PLOSCHUK, E.; SERNA, L.; YANOVSKY, M.; CASAL, J.J.
Revista:
PLANT PHYSIOLOGY.
Editorial:
AMER SOC PLANT BIOLOGISTS
Referencias:
Año: 2009 vol. 150 p. 1083 - 1092
ISSN:
0032-0889
Resumen:
In open places, plants are exposed to higher fluence rates of photosynthetically active radiation and to higher red to far-red
ratios than under the shade of neighbor plants. High fluence rates are known to increase stomata density. Here we show that
high, compared to low, red to far-red ratios also increase stomata density in Arabidopsis (Arabidopsis thaliana). High red to farred
ratios increase the proportion of phytochrome B (phyB) in its active form and the phyB mutant exhibited a constitutively
low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level
of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the
expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level
of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the
expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
ratios increase the proportion of phytochrome B (phyB) in its active form and the phyB mutant exhibited a constitutively
low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level
of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the
expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level
of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the
expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Arabidopsis thaliana). High red to farred
ratios increase the proportion of phytochrome B (phyB) in its active form and the phyB mutant exhibited a constitutively
low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level
of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the
expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level
of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the
expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
phyB mutant exhibited a constitutively
low stomata density. phyB increased the stomata index (the ratio between stomata and epidermal cells number) and the level
of anphistomy (by increasing stomata density more intensively in the adaxial than in the abaxial face). phyB promoted the
expression of FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
FAMA and TOO MANY MOUTHS genes involved in the regulation of stomata development in young leaves.
Increased stomata density resulted in increased transpiration per unit leaf area. However, phyB promoted photosynthesis rates
only at high fluence rates of photosynthetically active radiation. In accordance to these observations, phyB reduced long-term
water-use efficiency estimated by the analysis of isotopic discrimination against 13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area
13CO2.We propose a model where active phyB
promotes stomata differentiation in open places, allowing plants to take advantage of the higher irradiances at the expense of a
reduction of water-use efficiency, which is compensated by a reduced leaf area