PHYSIOLOGICAL AND BIOCHEMICAL ASPECTS OF TOLERANCE OF 3 GRASS SPECIES TO VARYING NA+/CA(2)+ RATIOS

被引：2

作者：

ASHRAF, M ^{[1
]}

NAQVI, MI ^{[1
]}

ZAFAR, ZU ^{[1
]}

机构：

[1] BAHAUDDIN ZAKARIYA UNIV,INST PURE & APPL BIOL,MULTAN,PAKISTAN

来源：

BIOLOGIA PLANTARUM | 1993年 / 35卷 / 03期

关键词：

D O I：

10.1007/BF02928521

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The effects of decreasing Ca2+ concentrations (Na/Ca ratios were 24, 49, 99 and 199) of the saline growth medium (NaCl concentration 200 mM) on three grass species Cenchrus pennisetiformis Hochst. & Steud., Leptochloa fusca L. Kunth. and Panicum turgidum Forssk. were assessed after 7 weeks growth in sand culture. L. fusca produced the highest dry biomass of all the species at varying Na/Ca ratios. Number of tillers per plant and number of green leaves per tiller were reduced significantly only in C. pennisetiformis. Leaf water potential of C pennisetiformis decreased at all external Na/Ca ratios, whereas in L. fusca it decreased only at an Na/Ca ratio of 99. Leaf osmotic potential of L. fusca consistently decreased at all Na/Ca ratios, whereas that of the other two species remained unchanged. The shoot and root total sugars of all species remained unaffected at all decreasing Ca2+ concentrations. In P. turgidum chlorophyll b and total chlorophyll decreased consistently at all Na/Ca ratios, but in L. fusca they decreased only at the highest Na/Ca ratios. The leaf soluble proteins of all the species remained unaffected at all Na/Ca ratios. The leaf free amino acids decreased significantly in L. fusca with the increase in Na/Ca ratios. The leaf proline content was only decreased in L. fusca at the highest Na/Ca ratio. The significant correlations between the growth of the three grass species and other variables determined in this study were not found.

引用

页码：425 / 433

页数：9

共 21 条

[1]

Ashraf M., The effect of NaCl on water relations, chlorophyll, and protein and proline contents of two cultivars of black gram (Vigna mungo L.), Plant Soil, 119, pp. 205-210, (1989)

[2]

Ashraf, M.H., Biological approach for economic utilization of the Cholistan desert, Biologia, 33, 2, pp. 27-34, (1987)

[3]

Ashwell G., Colorimetric analysis of sugars, Methods in Enzymology, pp. 84-85, (1957)

[4]

Bates L.S., Waldren R.P., Teare I.D., Rapid determination of free proline for water-stress studies, Plant Soil, 39, pp. 205-207, (1973)

[5]

Epstein E., The essential role of calcium in selective ion transport by plant cells, PLANT PHYSIOLOGY, 36, pp. 437-444, (1961)

[6]

Flowers T.J, Troke P.F., Yeo A.R., The mechanism of salt tolerance in halophytes, Annual Review of Plant Physiology, 28, pp. 89-121, (1977)

[7]

Greenway H., Munns R., Mechanism of salt tolerance in non-halophytes, Annual Review of Plant Physiology, 31, pp. 149-190, (1980)

[8]

Hamilton P.B., Van Slyke D.D., Amino acid determination with ninhydrin, J. biol. Chem., 150, pp. 231-233, (1943)

[9]

Kawasaki T., Moritsugu M., Effect of calcium on salt injury in plants. II. Barley and rice. Ber. Ohara Inst. landwirtschaft, Biol., Okayama Univ., 17, pp. 73-81, (1978)

[10]

Kent L.M., Lauchli A., Germination and seedling growth of cotton: Salinity-calcium interactions, Plant, Cell and Environment, 8, pp. 155-159, (1985)

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