Page 147 - 《广西植物》2023年第12期
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12 期               李雪等: 外源水杨酸对低温胁迫下火龙果幼苗的形态及生理效应                                          2 3 1 3

































































             A. 0 级冷害症状的幼苗ꎻ B. Ⅰ级冷害症状的幼苗ꎻ C. Ⅱ级冷害症状的幼苗ꎻ D. 0 级冷害症状的幼苗叶片显微结构ꎻ E. Ⅰ级冷
             害症状的幼苗叶片显微结构ꎻ F. Ⅱ级冷害症状的幼苗叶片显微结构ꎻ G. 0 级冷害的幼苗叶片横切面显微结构ꎻ H. Ⅰ级冷害症
             状的幼苗叶片横切面显微结构ꎻ I. Ⅱ级冷害症状的幼苗叶片横切面显微结构ꎻ 1. 气孔ꎻ 2. 皱缩的表皮ꎻ 3. 角质层ꎻ 4. 表皮细
             胞ꎻ 5. 维管组织ꎻ 6. 储水组织ꎮ
             A. Seedlings with Grade 0 chilling injuryꎻ B. Seedlings with GradeⅠchilling injuryꎻ C. Seedlings with Grade Ⅱ chilling injuryꎻ D. Leaf
             microstructure of seedlings with Grade 0 chilling injuryꎻ E. Leaf microstructure of seedlings with GradeⅠchilling injuryꎻ F. Leaf microstructure
             of seedlings with GradeⅡchilling injuryꎻ G. Leaf cross ̄section microstructure of seedlings with Grade 0 chilling injuryꎻ H. Leaf cross ̄section
             microstructure of seedlings with Grade Ⅰ chilling injuryꎻ I. Leaf cross ̄section microstructure of seedlings with Grade Ⅱ chilling injuryꎻ
             1. Stomataꎻ 2. Wrinkled epidermisꎻ 3. Stratum corneumꎻ 4. Epidermal cellsꎻ 5. Vascular tissueꎻ 6. Water storage tissue.
                              图 1  低温胁迫下 3 个冷害症状等级的火龙果幼苗形态和叶片显微结构
            Fig. 1  Morphology and leaf microstructure of pitaya seedlings with three chilling injury grades under low temperature stress
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