Proceedings of the XLV Italian Society of Agricultural Genetics - SIGA Annual Congress

Salsomaggiore Terme, Italy - 26/29 September, 2001

ISBN 88-900622-1-5

Poster Abstract

SALT TOLERANCE OF TOBACCO VIRGINIA BRIGHT

LOMBARDI D.A., ANGELINI P., TORSELLO R.

Research Institute for Tobacco, SOP, Lecce Italy

salt stress, genotypes, tobacco

In this paper an attempt is made to investigate the irrigation effects with poor quality waters on genotypes of Nicotiana tabacum L., biotype Virginia bright, especially at their early stages of growth. Four different genotypes of tobacco (Coker 48, NC 2326, Mc Nair 944, K1GTSNE) were grown in a field plot experiment in 2000 in Apulia (Lecce area).

For this purpose tree levels of irrigation waters, characterised by electrical conductivity values (Ecw) of 2,22 dSm^-1, 6,77 dSm^-1, and 11,53 d Sm^-1 were employed. The number of watering was realized according to course thermo-pluviometric of season the waterings with saline water obtained with addition of commercial salt ( NaCl ) to the normal water.

Physiological, morphological and prroductive responses of the genotypes of tobacco were determined after the treatment. During the trial in field the plant biometric caracteristics parameters morpho-physiological,the parameters fresh weight and dry weight of the whole plant were determined at 4-5 succesive regular intervals.

In the plant of tobacco bred in plot in salt stress conditions the dry matter accumulation were increased in treatment T0,25 ,with a level of salinity of 0,25% of NaCl, in comparison of the test T0, and were reduced in treatment T0,50 ( NaCl 0,50%).

On the contrary, was observed a reduction of the yields of green leaves and cured leaves of genotypes of tobacco virginia bright, in response to saline treatment T0,25 and an increment of the yields treated with T0,50 , in comparison of the test TO.