NaCl胁迫对不同品系火龙果种子萌发及枝条扦插的影响
2015-10-21王会全张知杭
王会全 张知杭


摘要 [目的] 确定不同品系火龙果种子在NaCl胁迫下发芽情况和枝条的扦插成活率。 [方法]以红皮白肉和红皮红肉2个品系火龙果的种子及枝条为研究材料,研究NaCl胁迫对种子萌发和枝条扦插的影响。种子耐盐性试验设置了8个NaCl浓度(0、1、2、3、5、7、9、11 g/L);枝条扦插试验设置了4个浓度(0、1、3、5 g/L)。对不同浓度NaCl胁迫条件下火龙果种子萌发的发芽势、发芽率、发芽指数和扦插的长根情况观察分析。[结果]试验表明,NaCl胁迫下,2个品系的火龙果种子均表现出低浓度NaCl胁迫促进萌发,而高浓度抑制萌发,并且红皮红肉品系种子萌发能力优于红皮白肉品系;NaCl低浓度胁迫促进火龙果枝条的生根率和成活率,在相同浓度胁迫下红皮红肉品系生根率和成活率均高于红皮白肉品系。[结论] 研究可为火龙果在福建地区的生产栽培提供参考依据。
关键词 NaCl胁迫; 火龙果; 种子萌发; 扦插
中图分类号 S667.9 文献标识码 A 文章编号 0517-6611(2015)03-089-03
Effects of NaCl Stress on Seeds Germination and Stems Cutting of Two Pitaya Strains
WANG Huiquan, ZHANG Zhihang
(Department of Horticulture and Garden, Fujian Vocational College of Agriculture, Fuzhou, Fujian 350119)
Abstract [Objective] To determine the germination and stem cuttings survival rate of different strains of Pitaya under NaCl stress. [Method] Seeds and stems of two Pitaya strains [Hylocereus undatus Britt.& Rose and Hylocereus polyrhizus(Weber)Britt.&Rose]were used as materials to study the effects of NaCl stress on seed germination and stems cutting. Eight NaCl concentrations(0, 1, 2, 3, 5, 7, 9, 11 g/L) were setted to study the NaCl resistance and four concentrations (0, 1, 3, 5 g/L) were set for the study of stems cutting.Energy of germination, germination rate, germination index and the cutting were analyzed. [Result] The results showed that: the germination of seeds was promoted by low concentration of NaCl stress and inhibiting by high concentration. The seed germination ability of red meat strains is better than the red one white strains. Under the same concentration of NaCl stress the rooting rate of cutting and survival rate of shoots of red meat strains were higher than the white strains. [Conclusion] The study can provide reference basis for cultivation of Pitaya in Fujian region.
Key words NaCl stress; Pitaya; Seeds germination; Stems cutting
基金項目 福建农业职业技术学院科研项目(11ZY02)。
作者简介 王会全(1982- ),男,福建福州人,讲师,在读博士,从事果树生理研究。
收稿日期 20141203
火龙果(Hylocereus undatus)属仙人掌科(Caetaceae)三角柱属(Hylocereus)植物,原产中美洲的哥斯达黎加、尼加拉瓜、墨西哥、古巴等地,是当地非常普遍且主要的水果[1]。火龙果果实营养丰富,具有高维生素C、磷质、纤维素,低脂肪和热量等特点,是一种经济价值较高的新兴水果[2]。按果皮果肉颜色可分为红皮白肉(Hylocereus undatus Britt.& Rose)、红皮红肉[Hylocereus polyrhizus(Weber)Britt.&Rose]、红皮紫肉[Hylocereus costaricensis(Weber)Britt.& Rose]和黄皮白肉[Selenicereus megalanthus(Schum.)Britt.& Rose]4类,目前国内商业栽培以红皮白肉及红皮红肉类型为主[3]。……
