Fig. 10
Effect of exogenous Spd on chloroplast ultrastructure in tomato seedlings grown under salinity–alkalinity stress. cv. ZZ, cv. Zhongza No. 9; cv. JP, cv. Jinpengchaoguan; CK, 1/2 Hoagland’s solution; S, 75 mM saline–alkaline solution (NaCl: Na2SO4: NaHCO3: Na2CO3 = 1:9:9:1); SS, sprayed with 0.25 mM Spd and treated with 75 mM saline–alkaline solution. Data were obtained from the second expanded leaves (numbered basipetally) after salinity–alkalinity treatment for 6 days. SL, stroma lamellae; GL, grana lamellae; SG, starch grains; P, plastoglobuli. Scale bars for chloroplasts and thylakoids are 0.5 and 0.1 μm, respectively. a represents chloroplast of CK treated cv. Zhongza No.9; b represents thylakoid of CK treated cv. Zhongza No.9; c represents chloroplast of CK treated cv. Jinpengchaoguan; d represents thylakoid of CK treated cv. Jinpengchaoguan; e represents chloroplast of S treated cv. Zhongza No.9; f represents thylakoid of S treated cv. Zhongza No.9; g represents chloroplast of S treated cv. Jinpengchaoguan; h represents thylakoid of S treated cv. Jinpengchaoguan; i represents chloroplast of SS treated cv. Zhongza No.9; j represents thylakoid of SS treated cv. Zhongza No.9; k represents chloroplast of SS treated cv. Jinpengchaoguan; l represents thylakoid of SS treated cv. Jinpengchaoguan