Salinity induced structural changes in meristematic cells of barley roots

Huang, Cheng; Steveninck, R. F. M. Van

doi:10.1111/j.1469-8137.1990.tb00916.x

Cited by 43 publications

(20 citation statements)

References 24 publications

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“…In excised pea roots in culture, differentiation of vacuolated cells is noted much closer to the root apex under salt stress (Solomon et al, 1986). Also in barley (Hordeum vulgare) roots, vacuolation is advanced by the presence of salt (Huang and Van Steveninck, 1990).…”

Section: Role Of Elongation Versus Cell Division Activity In Responsementioning

confidence: 99%

Cell Cycle Modulation in the Response of the Primary Root of Arabidopsis to Salt Stress

2004

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Salt stress inhibits plant growth and development. We investigated the importance of cell cycle regulation in mediating the primary root growth response of Arabidopsis to salt stress. When seedlings were transferred to media with increasing concentrations of NaCl, root growth rate was progressively reduced. At day 3 after transfer of seedlings to growth medium containing 0.5% NaCl the primary roots grew at a constant rate well below that prior to the transfer, whereas those transferred to control medium kept accelerating. Kinematic analysis revealed that the growth reduction of the stressed roots was due to a decrease in cell production and a smaller mature cell length. Surprisingly, average cell cycle duration was not affected. Hence, the reduced cell production was due to a smaller number of dividing cells, i.e. a meristem size reduction. To analyze the mechanism of meristem size adaptation prior to day 3, we investigated the short-term cell cycle events following transfer to saline medium. Directly after transfer cyclin-dependent kinase (CDK) activity and CYCB1;2 promoter activity were transiently reduced. Because protein levels of both CDKA;1 and CDKB1;1 were not affected, the temporary inhibition of mitotic activity that allows adaptation to the stress condition is most likely mediated by posttranslational control of CDK activity. Thus, the adaptation to salt stress involves two phases: first, a rapid transient inhibition of the cell cycle that results in fewer cells remaining in the meristem. When the meristem reaches the appropriate size for the given conditions, cell cycle duration returns to its default.

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Section: Role Of Elongation Versus Cell Division Activity In Responsementioning

confidence: 99%

Cell Cycle Modulation in the Response of the Primary Root of Arabidopsis to Salt Stress

2004

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“…According to Jeschke and Wolf (1988) salt tolerance of the plant depends decisively on the tolerance of roots. Ultrastructural changes of root cells in response to salt stress have been studied in wheat (Udovenko et al, 1970), maize (Yeo et al, 1977), barley (Huang and Steveninck, 1990), bean (Nassery and Jones, 1976), sorghum (Koyro, 1997), rice (Rahman et al, 2001(Rahman et al, , 2002 and other species. Rahman et al (2001) observed the expansion of root cap cells in rice plants under salinity stress and suggested it to be an adaptive response to salinity.…”

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confidence: 99%

Differential Sensitivity of Rice Cultivars to Salinity and Its Relation to Ion Accumulation and Root Tip Structure

Ferdose

Kawasaki

Taniguchi

et al. 2009

Plant Production Science

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: Effects of NaCl on the growth, ion content, root cap structure and Casparian band development were examined in four rice (Oryza sativa L.) cultivars with different salt resistance (salt-sensitive indica-type IR 24 and japonica-type Nipponbare and salt-resistant indica-type Nona Bokra and Pokkali). Experiments were conducted to find the differences in salinity resistance during early seedling and developed seedling stages among the cultivars. For salinity treatment, sodium chloride (NaCl) was added to nutrient solution at concentrations of 0, 25 and 50 mM for 7 days from germination to the 7th day (early seedling stage) or from the 7th day to 14th day (developed seedling stage). Growth inhibition by salinity was more prominent in the early seedling stage than in the developed seedling stage. Based on the growth, the order of the sensitivity was IR24 > Nipponbare > Nona Bokra > Pokkali. The growth of NaCl-treated rice cultivars relative to control was significantly and negatively correlated with the Na + content and Na + /K + ratio in roots and shoots in both stages. Scanning electron microscopic observation revealed that the root cap tissues proliferated and extended to the basal part of the root tip by salinity. The length of root cap was, however, reduced by 50 mM NaCl in sensitive cultivars due to peeling off. An endodermal Casparian band was formed in the basal region of the root tip. Development of the Casparian band was more prominent in sensitive cultivars than in tolerant cultivars. Root cap proliferation might be related to NaCl resistance in rice seedlings, but the Casparian band may not function efficiently in Na + exclusion. Essentially the present results suggest that exclusion of Na + from roots plays a critical role in expression of Na + resistance in rice seedlings and the root cap is important for Na + exclusion.

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“…Cell length was decreased by salt stress in cotton (kurth et al, 1986), barley (Huang and van Steveninck, 1990) and Arabidopsis (West et al, 2004). In cotton root, the length of cortical cells declined as the concentration of NaCl was increased above 50 mM (kurth et al, 1986).…”

Section: Discussionmentioning

confidence: 99%

Quantitative Analysis of Cell Division and Cell Death in Seminal Root of Rye under Salt Stress

Ogawa

Kitamichi

Toyofuku

et al. 2006

Plant Production Science

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Salinity induced structural changes in meristematic cells of barley roots

Cited by 43 publications

References 24 publications

Cell Cycle Modulation in the Response of the Primary Root of Arabidopsis to Salt Stress

Cell Cycle Modulation in the Response of the Primary Root of Arabidopsis to Salt Stress

Differential Sensitivity of Rice Cultivars to Salinity and Its Relation to Ion Accumulation and Root Tip Structure

Quantitative Analysis of Cell Division and Cell Death in Seminal Root of Rye under Salt Stress

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