花期盐水滴灌对10份番茄种质的主要性状影响及耐盐性评价

【目的】测定10个不同番茄种质的主要植株及叶片生理性状,筛选优异的耐盐碱种质,为优异耐盐新品种改良提供参考依据。【方法】以10个不同番茄种质为试材,采用花期盐水滴灌处理,以清水滴灌为对照,采用NaCl配置的盐水(6 ms/cm)全生育期滴灌盐胁迫处理。测定盐胁迫后番茄植株的株高、茎粗、相对叶绿素含量(SPAD)值、叶片丙二醛(MDA)含量、可溶性蛋白、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)活性。【结果】花期盐水滴灌胁迫下,不同参试番茄材料的株高、茎粗和SPAD值均不同程度降低、可溶性蛋白含量、SOD、POD和CAT 酶活性不同程度提高。采用隶属函数法和主成分分析法对10个不同番茄种质的耐盐性进行综合评价,由强到弱依次为C₃>C₁>C₅>C₉>C₈> C₂>C₇>C₆>C₁₀>C₄。【结论】花期盐水滴灌胁迫导致所有参试番茄材料叶片氧化损伤发生,生长受到抑制,并通过渗透调节和抗氧化酶促系统响应盐胁迫逆境。不同番茄材料对盐水滴灌胁迫的敏感性和耐受性存在差异。材料的耐盐性由强到弱依次为C₃>C₁>C₅>C₉>C₈>C₂>C₇>C₆>C₁₀>C₄。

Effect of Drip Irrigation with Saltwater during Flowering on Main Characters of 10 Tomato Germplasm and Evaluation of Salt Tolerance

【Objective】 To determine the physiological characteristics of main plants and leaves of 10 different tomato germplasm by drip irrigation with saline at the flowering stage and screen out excellent salt-tolerant germplasm with a view to providing reference for the improvement of excellent salt-tolerant new varieties.【Method】 Ten different tomato germplasm were used as test materials, and clear water drip irrigation was taken as control.The salt water (6 ms/cm) configured with NaCl was employed for salt stress treatment during the whole growth period to determine the plant height, stem thickness, relative chlorophyll content (SPAD) value, leaf malondialdehyde (MDA) content, soluble protein, superoxide dismutase (SOD), catalase (CAT) and Peroxidase (POD) activity.【Result】 Under the stress of saline drip irrigation at flowering stage, the plant height, stem thickness and SPAD value of different tested tomato materials were reduced to varying degrees, and the soluble protein content, SOD, POD and CAT enzyme activities were increased to different degrees.The membership function method and principal component analysis method were used to comprehensively evaluate the salt tolerance of 10 different tomato germplasm, and the order from strong to weak was as follows: C₃>C₁>C₅>C₉>C₈> C₂>C₇>C₆>C₁₀>C₄.【Conclusion】 The stress of saline drip irrigation at the flowering stage causes oxidative damage to the leaves of all the tested tomato materials, and their growth was inhibited, and they responded to salt stress through osmotic adjustment and antioxidant enzymatic systems.Different tomato materials have different sensitivity and tolerance to salt water drip irrigation.The salt resistance of the tested materials from strong to weak is: C₃>C₁>C₅>C₉>C₈>C₂>C₇>C₆>C₁₀>C₄.