Abstract: In order to study the drought resistance characteristics of different varieties of figs, the theoretical basis for the selection of drought-resistant varieties of figs was provided. The four common fig cultivars Bpjihon, Masui Dauphine, China Purple Country, Qingpi were born in China. Cutting seedlings are test materials. Through potted water control, normal water supply CK (70% to 75% of field water holding capacity), mild drought LD (50% to 55% of field water holding capacity), and moderate drought MD (40% to 45% of field water holding capacity), severe drought SD (30% to 35% of field water holding capacity), extreme drought ED (20% to 25% of field water holding capacity) 5 water treatment gradients to treat the material. Through the determination of various physiological and biochemical indicators, the drought resistance of four fig varieties was evaluated by the membership function method. The results showed that with the increase of drought degree, the root activity of the four cultivars increased first and then decreased; leaf relative water content (LRWC), chlorophyll content, maximum quantum yield (Fv/Fm) and actual quantum yield (Y(Ⅱ)) significantly decreased (P<0.05); relative conductivity and malondialdehyde (MDA) content increased significantly (P<0.05); osmotic adjustment substance soluble sugar (SS) content increased significantly, soluble protein (SP) content decreased significantly in Bpjihon and China Purple Country (P<0.05), the other two varieties did not change significantly, the free proline (Pro) content increased first and then decreased (P<0.05), and mostly in severe drought. The maximum value of antioxidant enzymes superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) increased first and then decreased, but the degree of drought reached the maximum. The difference was that the drought resistance of the four figs was Bpjihon>Masui Dauphine>Qingpi>China Purple Country.

Key words: Ficus carica L., Drought stress, Physiology, Drought resistance

CLC Number: 

• S663.01