【摘要】 以观赏葫芦幼苗为试材，试验研究了不同盐浓度(0、50、100、200、300 mmol/L NaCl)对观赏葫芦幼苗生长及生理特性的影响。结果表明：当盐浓度为50 mmol/L(即S 50处理)时，幼苗受到的危害较小；随着盐浓度的不断提高，当盐浓度为300 mmol/L,盐胁迫会抑制观赏葫芦幼苗的株高(下降17.70%),减少幼苗生物量的积累，叶绿素总含量降低26.54%,降低幼苗抗氧化酶(超氧化物歧化酶、过氧化物酶、过氧化氢酶和抗坏血酸过氧化物酶)活性，增强幼苗体内抗性指标(脯氨酸、丙二醛和可溶性糖)含量的积累以及植物细胞膜选择透过性。当NaCl溶液在200 mmol/L及以下范围，观赏葫芦幼苗会通过调控体内渗透物质等减轻胁迫伤害；当NaCl溶液在200 mmol/L以上范围，观赏葫芦幼苗的叶片细胞结构受损严重进而影响生长。为此，建议在盐溶液为200 mmol/L以下范围的区域试种及推广种植。更多还原

【Abstract】 This experiment used Lagenaria siceraria seedlings as the test material to study the effects of different salt concentrations(0, 50, 100, 200 and 300 mmol/L NaCl) on the growth and physiological characteristics of Lagenaria siceraria seedlings. The research results indicate that when the salt concentration is 50 mmol/L(i.e. S 50 treatment), the harm to seedlings is relatively small; With the continuous increase of salt concentration, when the salt concentration is 300 mmol/L, salt stress will inhibit the height of Lagenaria siceraria seedlings(decrease of 17.70%), reduce the accumulation of seedling biomass, reduce the total chlorophyll content by 26.54%, reduce the activity of antioxidant enzymes(superoxide dismutase, peroxidase, catalase, and ascorbic acid peroxidase) in the seedlings and enhance the accumulation of resistance indicators(proline, malondialdehyde, and soluble sugar) in seedlings, as well as the selective permeability of plant cell membranes. When NaCl solution is within the range of 200 mmol/L or below, Lagenaria siceraria seedlings will alleviate stress damage by regulating osmotic substances in the body; When the NaCl solution is above 200 mmol/L, the leaf cell structures of Lagenaria siceraria seedlings are severely damaged, which affects their growth. It is recommended to test and promote planting in areas with a salt solution below 200 mmol/L更多还原