Physiological and Proteomic analysis were studied in longan peel (Dimocarpus longan Lour. Var. Daw) from Ban Phu Din, Mae Taeng District, Chiang Mai Province. This research compared the physiological disorder of longan peel after Zn and B treatments were applied at concentration (w/w) 0% (T1), 0.1% B (T2), 0.2% B (T3), 0.1% Zn (T4), 0.2% Zn (T5), 0.1% B + 0.1% Zn (T6) and 0.2% B + 0.2% Zn (T7) on longan leaves of treatment period at 0, 8, 16, 24 and 28 weeks, respectively, and on fruit growth period of longan after fruiting (1, 2 and 4 months, respectively) in some weeks and treatments on throughout experiment and the color value of longan leaves (L, a and b) in these treatments had significant compared to T1 at 8 and 16 weeks, respectively. Protein content study by Lowry method was found that no significant difference was between groups receiving boron and zinc treatments and the abnormal group. Protein separation by using one dimensional electrophoresis (1-D gel) of 80 ?g proteins in reducing sample conditions at 12.5% gel staining with Coomassie brilliantblue R-250 indicated that 18.60 Kda of protein band in gel expression (vegetative storage protein, 25.17 KDa) was decreased in groups receiving boron and zinc treatments.
Physical characteristics (width, length and weight) in long fruit of all groups were not different for 4 months. Protein content study by Lowry method was found that no significant difference was between groups receiving boron and zinc treatments (T2-T7) and the abnormal group. Protein separation by using one dimensional electrophoresis (1-D gel) of 10 ?g protein samples after cleanup processes in reducing sample conditions at 12.5% gel by using staining with Coomassie brilliant blue G-250 indicated that 20.83 kDa of protein band expression was decreased in group receiving boron and zinc treatment (T7) compared to the group of physiological disorder syndromes of longan peel skin (T1) throughout the 4 months after fruiting. This result had accordance with the decreased red value (a) of the longan peel. The results of Western blotting techniques are unclear due to problems with the antibodies being used. Therefore, further improvements are needed.