Early gene expression in the walnut tree occurring during stimulation of leaf hydraulic conductance by irradiance

Baaziz, Khaoula Ben; Lopez, David; Bouzid, Sadok; Cochard, Hervé; Venisse, J-S.; Sakr, Soulaïman

doi:10.1007/s10535-012-0120-4

Cited by 8 publications

(5 citation statements)

References 76 publications

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“…In such a context, the PIP (plasma membrane intrinsic protein) and TIP (tonoplast intrinsic proteins) subfamilies would be appropriate candidates, as their functions in water and CO 2 homeostasis are very specialised [67]. Our present results concur with studies indicating that maximal K L values and AQP transcript amounts occur at least 1 h after switching on the light [60][61][62]. Xiong et al [37] indicated that for most species the sufficient light intensity required to saturate K L is around 1000 µmol m −2 s −1 .…”

Section: Light Effects On Leaf Hydraulic Propertiessupporting

confidence: 89%

“…In B. pendula, a genome analysis has identified 33 putative genes encoding full-length AQP sequences [59]. The light-dependent increase of K L shows a tight correlation with AQP gene transcript abundance [60][61][62][63][64]. The activation of AQPs by phosphorylation is also associated with enhanced leaf water transport capacity [65,66].…”

Section: Light Effects On Leaf Hydraulic Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Leaf and Branch Hydraulic Plasticity of Two Light-Demanding Broadleaved Tree Species Differing in Water-Use Strategy

Õunapuu-Pikas

Venisse

Sellin

et al. 2022

Forests

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Global climate change creates new environmental scenarios and selective pressures; thus, a better understanding of the plasticity of plant functional traits is needed to predict how plant species will respond to shifts in climate. Among the important functional traits for plants are their hydraulic properties which ultimately determine their photosynthetic capacity, growth rate, and survival in a changing environment. In this study, the light sensitivity of leaf (KL) and branch hydraulic conductance (KB) to fast changes in irradiance, and hydraulic plasticity (PIh) was studied in two broadleaved tree species differing in water-use strategy—silver birch (Betula pendula) and hybrid aspen (Populus × wettsteinii). The KL increased by a factor of 3.5 and 1.5 from minimal values recorded in darkness to maximal values in high light conditions for birch and aspen, respectively, indicating a significantly higher PIh for birch (0.72) than for aspen leaves (0.35). KB increased 1.5-fold from dark to light conditions for both species. The high light sensitivity of KL and KB provides a regulatory mechanism to maintain a balance between transpirational demand and hydraulic supply. The plasticity of these traits increases the ability of plants to cope with a rapidly changing environment and to adapt to global climate change.

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Section: Light Effects On Leaf Hydraulic Propertiessupporting

confidence: 89%

Section: Light Effects On Leaf Hydraulic Propertiesmentioning

confidence: 99%

Leaf and Branch Hydraulic Plasticity of Two Light-Demanding Broadleaved Tree Species Differing in Water-Use Strategy

Õunapuu-Pikas

Venisse

Sellin

et al. 2022

Forests

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“…Three years later, 188 transcript-derived fragments (TDFs) from cDNA-AFLP in J. regia became available (Ben Bâaziz et al 2012). These were obtained as part of a study of lightinduced leaf hydraulic conductance (K leaf ), which plays a role in plant-regulation of water.…”

Section: Progress On Transcriptomicsmentioning

confidence: 99%

Walnut: past and future of genetic improvement

Bernard

Lheureux²,

Dirlewanger

2017

Tree Genetics & Genomes

163

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Persian or English walnut (Juglans regia L.), the walnut species cultivated for nut production, is one of the oldest food sources known. Persian walnuts, native to the mountain valleys of Central Asia, are grown worldwide in temperate areas. World production exceeds three million tons since 2012, mostly provided by China, the USA, and Iran. Despite very ancient culture of walnut species (Juglans spp.), breeding actually started in the twentieth century. Using a range of methodologies, from morphological markers to the most recent advances in genome analysis, many genetic studies of walnut have been conducted during the past 30 years, including examination of diversity, determination of relationships within or among germplasm collections and populations, phylogenetic and origin elucidation, genetic map construction, and biotic or abiotic stress investigations. The genetic improvement of walnut has undergone great evolution. The producing countries of the Middle East have widely studied morphological characteristics of walnut. The USA and France, for example, are behind important cultivar releases such as BChandler^and BFranquette.^Finally, genomics represents a major breakthrough in walnut improvement, in particular by recent sequencing of both chloroplast and nuclear genomes. This review summarizes worldwide molecular and Bomics^studies and gives an overview of the main walnut breeding programs.

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“…AQPs belong to a large superfamily known as major intrinsic proteins (MIPs) which selectively allow the flow of water and other small molecules through biological membranes (Baiges et al 2002). Plant AQPs play important roles in seed germination, cell elongation, stoma movement, response to stresses, and other cellular processes (Chaumont et al 1998, Jang et al 2004, Bouton et al 2005, Alleva et al 2010, Hussain et al 2011, Katsuhara et al 2011, Ben Bâaziz et al 2012, Kudoyarova et al 2013. Genome projects have revealed that more than 30 AQP genes exist in higher plants (Chaumont et al 2001, Johanson et al 2001), e.g., 35 members in Arabidopsis and at least 32 in maize.…”

Section: Introductionmentioning

confidence: 99%

Characterization of AQP gene expressions in Brassica napus during seed germination and in response to abiotic stresses

Ge¹,

Peng²,

Zhang³

et al. 2014

Biologia plant.

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Water transport across the cell membranes is regulated largely by a family of proteins known as aquaporins (AQPs). Plasma membrane intrinsic protein (PIP) is an important subfamily of plant AQPs localized on the plasma membrane. To investigate the molecular mechanism of water regulation in seed germination, seven genes encoding PIP were initially cloned and sequenced from the germinating seed cDNA pool of Brassica napus. They belong to the PIP1 and PIP2 subfamilies. The transcription of the seven cloned genes plus three previously identified AQP genes from B. napus were analyzed in different organs and different stages of seed germination by quantitative real-time PCR (qRT-PCR). The results show that the expressions of the ten AQP genes were lower or scarcely detected in dry seeds, but were up-regulated during germination as well as in young seedlings. In addition, the expression of these ten AQP genes in response to an abiotic stress during seed germination was investigated and the results also show differential responses to abiotic stress treatments. Our findings suggest that these ten genes play different roles during plant development and response to abiotic stresses in B. napus.

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Early gene expression in the walnut tree occurring during stimulation of leaf hydraulic conductance by irradiance

Cited by 8 publications

References 76 publications

Leaf and Branch Hydraulic Plasticity of Two Light-Demanding Broadleaved Tree Species Differing in Water-Use Strategy

Leaf and Branch Hydraulic Plasticity of Two Light-Demanding Broadleaved Tree Species Differing in Water-Use Strategy

Walnut: past and future of genetic improvement

Characterization of AQP gene expressions in Brassica napus during seed germination and in response to abiotic stresses

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