Tolerance of some tomato cultivars to heat and alteration of leaves protein pattern in response to elevated temperature

الملخص EN

Twe nty tomato t Lycop rrsicon esculantum L.

) cultivars wer e te sted for their toleran ce to he at stress by incubat ion at 35"C for 48 h in growth chambers.

To ma to cultivur s ' Da vistu, 'Nc rna' .

'Ram a' _' Ramada ' , 'Sta in R' and 'Su per Marrn and' we re the most tolerant lU e leva ted temper ature , ' Raf", 'Royc sra' .

'P.S.

878S', 'Spec ial Back ', ' Pe rson Improved' , 'Pakrnar' and 'W 1601' wer e moderately to le rant while Con tcssa , Everes t.

Mad eer , W 1350 .

Gihralte r, Asgrow 8

Leaf proteins of six tomato cultivars repre sentative of the se nsitive.

mod erate and most heat tolerant gro ups , incubated at 2SOC or 35"C for 24 h.

were separa ted by SD S slap gel electrophoresis.

Th c protein pa tterns o f the vari ou s tomato cultiva rs were cumpared .

Each tomato culuvur sho wed a specific protein patt ern and the similarit y amo ng tomato cultiva rs grown at 25°C ranged from 56 to 8601." Exposing toma to cu ltiva rs at 3S0C for 24 h indu ced 0-67% cha nge in their protein pattern .

Up to 4 new heat shoc k protein s (hsps) were form ed in tom ato leaves in response to he at stress .

However.

there was no correlation bet ween the number o f hsps ban ds and the tolerance of the culrivars to high temperature .