Hosseini Seyyed Jaber, Tahmasebi-Sarvestani Zeinolabedin, Pirdashti Hemmatollah, Modarres-Sanavy Seyed Ali Mohammad, Mokhtassi-Bidgoli Ali, Hazrati Saeid, Nicola Silvana
Department of Agronomy Tarbiat Modares University Tehran Iran.
Sari Agricultural Sciences and Natural Resources University Sari Iran.
Food Sci Nutr. 2021 Mar 15;9(5):2620-2643. doi: 10.1002/fsn3.2219. eCollection 2021 May.
Salinity stress is one of the main limiting factors of medicinal plant growth and may affect their characteristics and chemical composition. In order to evaluate the response of different species of Iranian mint to salinity stress, an experiment was designed in greenhouse conditions. In this experiment, six Iranian mint species were cultivated in pots under different salinity stress including 0, 2.5, 5, and 7.5 dS/m. The chlorophyll indices (a, b, total, and a/b ratio), carotenoids, total anthocyanin, total phenolic and flavonoid content, antioxidant activity, dry matter yield, and essential oil content were measured in two different harvest stages. Salinity stress affected various measured traits. The results showed that despite the negative effect of salinity stress on photosynthetic pigments, in some ecotypes and species, photosynthetic pigments were not affected by salinity stress. The amount of total phenolic content, total flavonoid content, and total anthocyanin increased in response to salinity stress. The dry matter decreased under salinity stress, but the content of essential oil increased as a result of salinity stress increment. The results of PCA biplot showed that the E16 and E18 ecotypes were separated by a large distance. Among the various ecotypes, E18 had the most desirable traits which can be recognized as a salt-tolerant ecotype. Also, species was the best among the species in all salinity stress levels.
盐胁迫是药用植物生长的主要限制因素之一，可能会影响其特性和化学成分。为了评估不同种类的伊朗薄荷对盐胁迫的响应，在温室条件下设计了一项实验。在该实验中，六种伊朗薄荷在不同盐胁迫（包括0、2.5、5和7.5 dS/m）下盆栽种植。在两个不同收获阶段测量了叶绿素指数（a、b、总量和a/b比值）、类胡萝卜素、总花青素、总酚和黄酮含量、抗氧化活性、干物质产量和精油含量。盐胁迫影响了各种测量性状。结果表明，尽管盐胁迫对光合色素有负面影响，但在一些生态型和种类中，光合色素不受盐胁迫影响。盐胁迫下总酚含量、总黄酮含量和总花青素含量增加。盐胁迫下干物质减少，但精油含量因盐胁迫增加而增加。主成分分析双标图结果表明，E16和E18生态型相距较远。在各种生态型中，E18具有最理想的性状，可被认为是耐盐生态型。此外，在所有盐胁迫水平下，该种类在种类中表现最佳。
