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2009 | 31 | 2 |

Tytuł artykułu

Comparison of the effects of NaCl and KCl at the roots on seedling growth, cell death and the size, frequency and secretion rate of salt glands in leaves of Limonium sinense

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Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Twenty days’ exposure to 50 or 100 mM NaCl in the rooting medium substantially increased fresh and dry weights of seedling shoots of the recretohalophyte Limonium sinense while 200 or 300 mM were increasingly inhibitory. KCl treatment was only slightly stimulating (50 mM) or strongly inhibitory (100–300 mM). Lesser effects on leaf area were also seen. Diameter of foliar salt glands was significantly larger than that of controls in 100 and 200 mM NaCl with the effect being reversed at higher concentrations. Gland enlargement was also observed in the presence of 100 mM KCl, while larger concentrations reduced gland size. Generally, gland diameter was larger in the presence of NaCl than in KCl. NaCl and KCl also increased gland number per leaf and secretion rate per gland. At 100 and 200 mM NaCl or KCl, Na⁺ secretion per leaf from NaCl-treated plants exceeded K⁺ secretion rate from KCl-treated plants while at 200 mM, Na⁺ secretion per gland was significantly higher for Na⁺ than for K⁺. Evidence of cell death in leaves of salt-treated plants using Evans blue staining indicates that release of cell contents through loss of membrane integrity contributed to the secretion values. We conclude that the greater tolerance of L. sinenseto to NaCl compared to KCl is linked to the more effective secretion of Na⁺ than of K⁺ and, in turn, to a greater stimulation of salt gland formation and activity and larger gland diameter.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

31

Numer

2

Opis fizyczny

p.343-350,fig.,ref.

Twórcy

autor
  • College of Life Science, Shandong Normal University, 250014 Jinan, People's Republic of China
autor
  • College of Life Science, Shandong Normal University, 250014 Jinan, People's Republic of China
autor
  • College of Life Science, Shandong Normal University, 250014 Jinan, People's Republic of China
autor
  • College of Life Science, Shandong Normal University, 250014 Jinan, People's Republic of China

Bibliografia

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  • Gaff DF, Okong ‘O-Ogola O (1971) The use of nonpermeating pigments for testing the survival of cells. J Exp Bot 22:756–758. doi:10.1093/jxb/22.3.756
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  • Liphschitz N, Waisel Y (1974) Existence of salt glands in various genera of the Gramineae. New Phytol 73:507–513. doi:10.1111/j.1469-8137.1974.tb02129.x
  • Lu JM, Li JD, Hu AL, Li XL (1995) Observation of secretory salt structure in Limonium bicolor leaf. Chin J Appl Environ Biol 6:355–358
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  • Marcum KB, Murdoch CL (1992) Salt tolerance of the coastal salt marsh grass, Sporobolus virginicus (L.) Kunth. New Phytol 120:281–288. doi:10.1111/j.1469-8137.1992.tb05665.x
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  • Rozema J, Riphagen I (1977) Physiology and ecologic relevance of salt secretion by salt glands of Glaux maritima L. Oecologia 29:349–357. doi:10.1007/BF00345808
  • Thomson WW, Berry WL, Liu LL (1969) Localization and secretion of salt by the salt glands of Tamarix phylla. Proc Natl Acad Sci USA 63:310–317. doi:10.1073/pnas.63.2.310
  • Waisel Y (1960) Ecological studies on Tamarix aphylla (L.) Karst.III. The salt economy. Plant Soil 13:356–364. doi:10.1007/ BF01394647
  • Wright KM, Duncan GH, Pradel KS, Carr F, Wood S, Oparka KJ, Cruz SS (2000) Analysis of the N gene hypersensitive response induced by a fluorescently tagged tobacco mosaic virus. Plant Physiol 123:1375–1386. doi:10.1104/pp.123.4.1375
  • Zhou S, Zhao KF (2003) Discussion on the problem of salt gland of Glycine soja. Acta Bot Sin 45:574–580

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