Salt Tolerance and Crop Potential of Halophytes

Glenn, Edward P.; Brown, J. Jed; Blumwald, Eduardo

doi:10.1080/07352689991309207

Cited by 498 publications

(278 citation statements)

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“…The sensitivity of cytosolic enzymes to Na 1 is similar in both glycophytes and halophytes, indicating that the maintenance of a low cytosolic Na 1 to K 1 ratio is a key requirement of plant growth in saline soil (Glenn et al, 1999;Apse and Blumwald, 2002). Some cation transporters mediate ion homeostasis in the cytoplasm and contribute to the salt tolerance of plants.…”

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confidence: 99%

Rice Shaker Potassium Channel OsKAT1 Confers Tolerance to Salinity Stress on Yeast and Rice Cells

Obata

Kitamoto²,

Nakamura³

et al. 2007

Plant Physiol.

146

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We screened a rice (Oryza sativa L. 'Nipponbare') full-length cDNA expression library through functional complementation in yeast (Saccharomyces cerevisiae) to find novel cation transporters involved in salt tolerance. We found that expression of a cDNA clone, encoding the rice homolog of Shaker family K 1 channel KAT1 (OsKAT1), suppressed the salt-sensitive phenotype of yeast strain G19 (Dena1-4), which lacks a major component of Na 1 efflux. It also suppressed a K 1 -transport-defective phenotype of yeast strain CY162 (Dtrk1Dtrk2), suggesting the enhancement of K 1 uptake by OsKAT1. By the expression of OsKAT1, the K 1 contents of salt-stressed G19 cells increased during the exponential growth phase. At the linear phase, however, OsKAT1-expressing G19 cells accumulated less Na 1 than nonexpressing cells, but almost the same K 1 . The cellular Na 1 to K 1 ratio of OsKAT1-expressing G19 cells remained lower than nonexpressing cells under saline conditions. Rice cells overexpressing OsKAT1 also showed enhanced salt tolerance and increased cellular K 1 content. These functions of OsKAT1 are likely to be common among Shaker K 1 channels because OsAKT1 and Arabidopsis (Arabidopsis thaliana) KAT1 were able to complement the salt-sensitive phenotype of G19 as well as OsKAT1. The expression of OsKAT1 was restricted to internodes and rachides of wild-type rice, whereas other Shaker family genes were expressed in various organs. These results suggest that OsKAT1 is involved in salt tolerance of rice in cooperation with other K 1 channels by participating in maintenance of cytosolic cation homeostasis during salt stress and thus protects cells from Na 1 .

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mentioning

confidence: 99%

Rice Shaker Potassium Channel OsKAT1 Confers Tolerance to Salinity Stress on Yeast and Rice Cells

Obata

Kitamoto²,

Nakamura³

et al. 2007

Plant Physiol.

146

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“…As an example, Salicornia bigelovii (dwarf glasswort) grows well at the root medium containing 70 g L −1 of dissolved salts (Glenn et al, 1998). The marginal halophytes, such as date palm (Phoenix dactylifera) and barley (Hordeum vulgare) are able to tolerate about 5 g L − 1 (Glenn and Brown, 1999). Numerous species also belong among the potentially useful halophytes, such as Atriplex (saltbush, orache, orach), Attalea speciose (babassu), Anemopsis californica (yerba mansa, lizard tail), Panicum virgatum (switchgrass), Spartina alterniflora (smooth cordgrass), Salicornia bigelovii (dwarf glasswort, pickleweed), Tetragonia tetragonoides (warrigal greens, kōkihi, sea spinach).…”

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confidence: 99%

Applying hyperspectral imaging to explore natural plant diversity towards improving salt stress tolerance

Sytar

Brestič

Živčák

et al. 2017

Science of The Total Environment

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• Salinity represents an abiotic stress constraint affecting growth and productivity of plants • Better solutions is to improve the level of salt resistance using natural genetic variability within crop species • Phenomic methodology employing different non-invasive imaging systems for detecting quantitative and qualitative changes caused by salt stress at the whole plant and canopy level. Hyperspectral imaging techniques provide unique opportunities for fast and reliable evaluation of numerous characteristics associated both with various structural, biochemical and physiological traits • Salt-soil-plant interaction and sustainable coastal agriculture need powerful phenotyping tools Salinity represents an abiotic stress constraint affecting growth and productivity of plants in many regions of the world. One of the possible solutions is to improve the level of salt resistance using natural genetic variability within crop species. In the context of recent knowledge on salt stress effects and mechanisms of salt tolerance, this review present useful phenomic approach employing different non-invasive imaging systems for detection of quantitative and qualitative changes caused by salt stress at the plant and canopy level. The focus is put on hyperspectral imaging technique, which provides unique opportunities for fast and reliable estimate of numerous characteristics associated both with various structural, biochemical Science of the Total Environment 578 (2017) 90-99 ⁎ Corresponding authors at:

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“…Altos teores de Na, ou baixa relação K/Na no solo, podem deflagrar uma série de processos enzimáticos no citoplasma da planta, permitindo a competição entre o Na e o K pelos sítios de absorção (Obata et al, 2007), sendo a capacidade da planta em manter alta a relação K/Na no citosol premissa básica para o adequado crescimento em solos salinos (Glenn et al, 1999). As concentrações foliar de íons podem ser usados para distinção entre variedades "Na-inclusoras" e "Na-evitadoras".…”

Section: Absorção De Cátions Pelo Arrozunclassified

Estabelecimento do arroz irrigado e absorção de cátions em função do manejo da adubação potássica e do nível de salinidade no solo

Carmona

Anghinoni

Meurer

et al. 2009

Rev. Bras. Ciênc. Solo

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RESUMO O uso da água para a irrigação do arroz no Rio Grande do Sul, cujos mananciais hídricos têm ligação com o mar, pode ocasionar acúmulo de sais no solo em concentrações prejudiciais ao estabelecimento da cultura nos anos subsequentes, especialmente quando são aplicadas altas doses de fertilizante potássico na linha de semeadura. Este trabalho foi realizado com o objetivo de avaliar o efeito do manejo da adubação potássica sobre o estabelecimento e a absorção de cátions pelo arroz (cultivar IRGA 417) em um solo com diferentes níveis de saturação por Na. Foram utilizados um Planossolo Háplico com saturações por Na na troca de 5, 10 e 20 %; três manejos da adubação com cloreto de K equivalentes a 120 kg ha -1 de K 2 O a lanço; 120 kg ha -1 de K 2 O na linha de semeadura e 60 kg ha -1 de K 2 O na linha de semeadura, além de uma testemunha, sem adição de sal e de fertilizante, fatorial (3 x 3) + 1. O estande de plântulas não foi afetado pelos níveis de salinidade do solo e manejo da adubação potássica. A ontogenia da planta foi afetada pela salinidade, com atraso na emergência das plântulas. A salinidade do solo, a partir de 10 % de saturação por Na no complexo de troca, inibiu a absorção de K e reduziu o crescimento das plântulas de arroz, assim como diminuiu as relações K/Na, Ca/Na e Mg/Na no tecido. A interação entre manejo da adubação x salinidade reduziu o teor de Ca trocável no solo, aumentou o teor de Na na parte aérea e reduziu a relação Ca/Na na parte aérea do arroz.Termos de indexação: saturação por sódio, Oryza sativa, potássio, cálcio e magnésio.

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Salt Tolerance and Crop Potential of Halophytes

Cited by 498 publications

References 0 publications

Rice Shaker Potassium Channel OsKAT1 Confers Tolerance to Salinity Stress on Yeast and Rice Cells

Rice Shaker Potassium Channel OsKAT1 Confers Tolerance to Salinity Stress on Yeast and Rice Cells

Applying hyperspectral imaging to explore natural plant diversity towards improving salt stress tolerance

Estabelecimento do arroz irrigado e absorção de cátions em função do manejo da adubação potássica e do nível de salinidade no solo

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