Modulation of certain physiological parameters to salinity in Casuarina equisetifolia seedlings inoculated with five different Frankia strains

A. Balasubramanian, . and P.S. Srinivasan, . and G Kumaravelu, . Modulation of certain physiological parameters to salinity in Casuarina equisetifolia seedlings inoculated with five different Frankia strains. pp. 16-22. ISSN 0128-1283

The salinity tolerance of Casuarina equisetifolia inoculated with five Frankia strains was evaluated by measuring the needle transpiration diffusive resistance and seedling water potential of the plant. The seedlings were inoculated in the form of nodule suspension and subjected to four salt treatments viz. control (T‚) 0.15 mg (low) (T‚�) 1.5 mg (medium) (T‚‚) and 15 mg (high) (T‚) of NaCl per gram of soil. The low salt concentration increased the transpiration and reduced the stomatal resistance but maintained a higher water potential. On the other hand the medium and high concentrations drastically reduced the transpiration by increasing the stomatal resistance resulting in a low water potential and thus ultimately the death of seedlings. Besides the good growth of Casuarina seedlings was observed with two Frankia sources namely Sugar-cane Research Station Tamil Nadu Agricultural University (Cuddalore) and Marakanam.

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Abstract

The salinity tolerance of Casuarina equisetifolia inoculated with five Frankia strains was evaluated by measuring the needle transpiration diffusive resistance and seedling water potential of the plant. The seedlings were inoculated in the form of nodule suspension and subjected to four salt treatments viz. control (T‚) 0.15 mg (low) (T‚�) 1.5 mg (medium) (T‚‚) and 15 mg (high) (T‚) of NaCl per gram of soil. The low salt concentration increased the transpiration and reduced the stomatal resistance but maintained a higher water potential. On the other hand the medium and high concentrations drastically reduced the transpiration by increasing the stomatal resistance resulting in a low water potential and thus ultimately the death of seedlings. Besides the good growth of Casuarina seedlings was observed with two Frankia sources namely Sugar-cane Research Station Tamil Nadu Agricultural University (Cuddalore) and Marakanam.

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Item Type:	Article
AGROVOC Term:	Salinity
AGROVOC Term:	Tolerance
AGROVOC Term:	Casuarina equisetifolia
AGROVOC Term:	Seedlings
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:27
URI:	http://webagris.upm.edu.my/id/eprint/22549

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