Significance of plasmalemma aquaporins for water‐transport in <i>Arabidopsis thaliana</i>

Kaldenhoff, Ralf; Grote, Karsten; Jian-jun, Zhu; Zimmermann, U.

doi:10.1046/j.1365-313x.1998.00111.x

Cited by 261 publications

(194 citation statements)

References 36 publications

(57 reference statements)

Supporting

Mentioning

178

Contrasting

Unclassified

Order By: Relevance

“…Expression of aquaporin genes are regulated under water stress treatments in many plant species [17,18,[20][21][22]. In order to understand the nature of aquaporin genes in rice, we analyzed the expression patterns of the ten OsPIP genes under the treatments of ABA, salinity and drought.…”

Section: Discussionmentioning

confidence: 99%

“…The expression patterns of aquaporin genes in response to salt, drought, cold, submergence, light, and phytohormones have also been characterized in various plants [16][17][18][19][20][21][22][23][24]. Some aquaporins are tissue-specific, such as g-MIP in shoots of rice [21], g-TIP in seeds of Brassica napus [16] and ZmTIP2-3 in roots of maize [25].…”

Section: Introductionmentioning

confidence: 99%

“…There were thirteen PIP genes among the identified thirty and thirty-one aquaporin genes in Arabidopsis and maize, respectively [13,26]. The function and expression patterns of the PIP gene family have been intensively studied in Arabidopsis, Brassicca, and maize, especially in response to abiotic stress [7,17,18,[26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Expression and functional analysis of the rice plasma-membrane intrinsic protein gene family

et al. 2006

View full text Add to dashboard Cite

Plasma membrane intrinsic proteins (PIPs) are a subfamily of aquaporins that enable fast and controlled translocation of water across the membrane. In this study, we systematically identified and cloned ten PIP genes from rice. Based on the similarity of the amino acid sequences they encoded, these rice PIP genes were classified into two groups and designated as OsPIP1-1 to OsPIP1-3 and OsPIP2-1 to OsPIP2-7 following the nomenclature of PIP genes in maize. Quantitative RT-PCR analysis identified three root-specific and one leaf-specific OsPIP genes. Furthermore, the expression profile of each OsPIP gene in response to salt, drought and ABA treatment was examined in detail. Analysis on transgenic plants over-expressing of either OsPIP1 (OsPIP1-1) or OsPIP2 (OsPIP2-2) in wild-type Arabidopsis, showed enhanced tolerance to salt (100 mM of NaCl) and drought (200 mM of mannitol), but not to salt treatment of higher concentration (150 mM of NaCl). Taken together, these data suggest a distinct role of each OsPIP gene in response to different stresses, and should add a new layer to the understanding of the physiological function of rice PIP genes.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Expression and functional analysis of the rice plasma-membrane intrinsic protein gene family

et al. 2006

View full text Add to dashboard Cite

show abstract

“…Aquaporins present in the plasma membrane and also in sthe tonoplast are regulated by environmental factors such as drought, salinity, hormones, and blue light (Guerrero et al, 1990;Yamaguchi-Shinozaki et al, 1992;Yamada et al, 1995). Antisense PIP2 transformed lines resulted in reduced hydraulic conductance (Javot et al, 2003) and alterations in plant morphology (Kaldenhoff et al, 1998) while, overexpression of a plasma membrane aquaporin PIP1b, in transgenic tobacco improved plant vigor under favorable growth conditions but not under drought or salt stress (Aharon et al, 2003). Therefore, approaches involving alterations in plant plasma membrane aquaporins should, however, be viewed with prudence.…”

Section: Protein Complexes Involved In Water Deficit Responsesmentioning

confidence: 99%

Genetic approaches towards overcoming water deficit in plants - special emphasis on LEAs

Khurana

Vishnudasan

Chhibbar

2008

Physiol Mol Biol Plants

View full text Add to dashboard Cite

Water deficit arises as a result of low temperature, salinity and dehydration, thereby affecting plant growth adversely and making it imperative for plants to surmount such situations by acclimatizing/adapting at various levels. Water deficit stress results in significant changes in gene expression, mediated by interconnected signal transduction pathways that may be triggered by calcium, and regulated via ABA dependent and/or independent pathways. Hence, adaptation of plants to such stresses involves maintaining cellular homeostasis, detoxification of harmful elements and also growth alterations. Stress in general cause excess production of reactive oxygen species (ROS) and the plants overcome the same by either preventing the accumulation of ROS or by eliminating the ROS formed. Ion homeostasis includes processes such as cellular uptake, sequestration and export in conjunction with long distance transport. Requisite amounts of osmolytes are hence synthesized under stress to maintain turgor along with maintaining the macromolecular structures and also for scavenging ROS. Another noteworthy response is the accumulation of novel proteins, including enzymes involved in the biosynthesis of osmoprotectants, heat-shock proteins (HSPs), late embryogenesis abundant (LEA) proteins, antifreeze proteins, chaperones, detoxification enzymes, transcription factors, kinases and phosphatases. The LEAs belong to a redundant protein family and are highly hydrophilic, boiling-soluble, non-globular and therefore have been defined and classified accordingly. The precise function of LEAs is still unknown, but substantial evidence indicates their involvement in dessication tolerance as the expression of LEAs confers increased resistance to stress in heterologous yeast system and also significantly improves water deficit tolerance in transgenic plants. Genetic manipulation of plants towards conferring abiotic stress tolerance is a daunting task, as the abiotic stress tolerance mechanism is highly complex and various strategies have been exploited to address and evaluate the stress tolerance mechanism, and the molecular responses to water deficit via complex signaling networks. Genomic technologies have recently been useful in integrating the multigenicity of the plant stress responses through, transcriptomics, proteomics and metabolite profilling and their interactions. This review deals with the recent developments on genetic approaches for water stress tolerance in plants, with special emphasis on LEAs.

show abstract

“…drought, nutrient deficiency, low temperature) (Tyerman et al, 1999(Tyerman et al, , 2002. Regulation of the expression of specific water channel proteins in plasma membranes can change the cellular osmotic water permeability coefficient up to 3-fold (Kaldenhoff et al, 1998). Wheat root hydraulic conductance is greatly reduced by limiting N and P supply, probably due to the reduced activity or abundance of Hg-sensitive water channels in the roots (Carvajal et al, 1996).…”

Section: Role Of Water Channelsmentioning

confidence: 99%

Boron Nutrition and Chilling Tolerance of Warm Climate Crop Species

Huang¹,

Ye²,

Bell³

et al. 2005

Annals of Botany

View full text Add to dashboard Cite

Background Field observations and glasshouse studies have suggested links between boron (B)-deficiency and leaf damage induced by low temperature in crop plants, but causal relationships between these two stresses at physiological, biochemical and molecular levels have yet to be explored. Limited evidence at the whole-plant level suggests that chilling temperature in the root zone restricts B uptake capacity and/or B distribution/utilization efficiency in the shoot, but the nature of this interaction depends on chilling tolerance of species concerned, the mode of low temperature treatment (abrupt versus gradual temperature decline) and growth conditions (e.g. photon flux density and relative humidity) that may exacerbate chilling stress.Scope This review explores roles of B nutrition in chilling tolerance of continual root or transient shoot chills in crop species adapted to warm season conditions. It reviews current research on combined effects of chilling temperature (ranging from >0 to 20 C) and B deficiency on growth and B nutrition responses in crop species differing in chilling tolerance.Conclusion For subtropical/tropical species (e.g. cucumber, cassava, sunflower), root chilling at 10-17 C decreases B uptake efficiency and B utilization in the shoot and increases the shoot : root ratio, but chilling-tolerant temperate species (e.g. oilseed rape, wheat) require much lower root chill temperatures (2-5 C) to achieve the same responses. Boron deficiency exacerbates chilling injuries in leaf tissues, particularly under high photon flux density. Suggested mechanisms for B · chilling interactions in plants are: (a) chilling-induced reduction in plasmalemma hydraulic conductivity, membrane fluidity, water channel activity and root pressure, which contribute to the decrease in root hydraulic conductance, water uptake and associated B uptake; (b) chilling-induced stomatal dysfunction affecting B transport from root to shoot and B partitioning in the shoot; and (c) B deficiency induced sensitivity to photo-oxidative damage in leaf cells. However, specific evidence for each of the mechanisms is still lacking. Impacts of B status on chilling tolerance in crop species have important implications for the management of B supply during sensitive stages of growth, such as early growth after planting and early reproductive development, both of which can coincide with the occurrence of chilling temperatures in the field.

show abstract

Significance of plasmalemma aquaporins for water‐transport in Arabidopsis thaliana

Cited by 261 publications

References 36 publications

Expression and functional analysis of the rice plasma-membrane intrinsic protein gene family

Expression and functional analysis of the rice plasma-membrane intrinsic protein gene family

Genetic approaches towards overcoming water deficit in plants - special emphasis on LEAs

Boron Nutrition and Chilling Tolerance of Warm Climate Crop Species

Contact Info

Product

Resources

About