Author/Authors :
Masoumi ، Kazem نويسنده Deartment of Agricultur, Shirvan Branch , Islamic Azad University , Shirvan , Iran , , Asgharzadeh ، Seyed Ahmad نويسنده Infectious Diseases and Tropical Medicine Research Center, Babol University of Medical Sciences, Babol, Iran , , ganji moghadam، Ebrahim نويسنده Deartment of Agricultur, Shirvan Branch , Islamic Azad University , Shirvan , Iran , , Reyhani ، Maryam نويسنده Deartment of Agricultur, Shirvan Branch , Islamic Azad University , Shirvan , Iran , , sadat keshmiri، Fahime نويسنده Deartment of Agricultur, Shirvan Branch , Islamic Azad University , Shirvan , Iran ,
Abstract :
This study was conducted to determing freezing tolerance of Brassica oleraceae purple rosette(B.p) and Brassica oleraceae white rosette (B.w) at controlled conditions as a factorial complete randomized block design (RCBD) with four replications and 7 freezing temperatures (control, 0, -5, -10, -15, -20, -25, -30 Co). Chlorophyll fluorescence, chlorophyll content (SPAD), proline with cold tolerance were measured. By lowering the temperature chlorophyll fluorescence and chlorophyll content index decreased and on two spices maximal index exposed on control .Maximum proline average in -10o C (212.1 mmol/g) and in -5oC (189.2 mmol/g) exposed on B.p and B.w . Maximal significantly correlation (at the 0.01 level) exposed on chlorophyll content and Fv/Fm with temperature, the lower the temperature increased damages.
