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用NaCl琼脂固定法对蜜枚西瓜二倍体、三倍体、四倍体在不同浓度NaCl胁迫下发芽种子成苗率、下胚轴长、根长、侧根数等指标的测定,在30～60mmol/L低浓度下,不同倍性西瓜所测指标都比对照高,低浓度盐分胁迫,有助于根系和幼苗生长,倍性之间没有明显差异;在90mmol/L以上浓度时,不同倍性之间有明显差异,耐盐性为M4X>M2X>M3X。M4X可耐受150mmol/L浓度的盐分,M2X可耐受120mmol/L,M3X可耐受90mmol/L。NaCl琼脂固定法可作为鉴定西瓜品种耐盐性的有效方法。
The seedling rate, hypocotyl length, root length and lateral root number of germinating seeds of diploid, triploid and tetraploid of honey-colored watermelon were determined by NaCl agar fixation at 30 ~ Under the condition of 60mmol / L low concentration, the indexes of different ploidy watermelon were higher than those of the control, while the salt stress of low concentration could promote the growth of root and seedling. There was no significant difference between ploidy; Significant differences between the sexes, salt tolerance M4X> M2X> M3X. M4X can tolerate salt concentration of 150mmol / L, M2X can tolerate 120mmol / L, M3X can tolerate 90mmol / L. NaCl agar fixation method can be used as an effective method to identify salt tolerance of watermelon varieties.