多年生黑麥草對鋅和2-疏基苯并噻唑復合脅迫的響應

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中圖分類號：S543.6 文獻標識碼：A 文章編號：1007-0435（2025）08-2548-10

doi：10.11733/j.issn.1007-0435.2025.08.015

Abstract：In order to explore the response and tolerance diffrences of perennial ryegrass（Lolium perenne L.） under the combined stress of zinc（ ）and 2-mercaptobenzothiazole（MBT），2O perennial ryegrass cultivars were used as the research objects in this study. The effects of Zn+ MBT combined stress on biomass，photo synthetic pigments，osmotic adjustment substances and antioxidant enzyme activities of perennial ryegrass were analyzed in a hydroponic experiment，and the comprehensive response index was used for evaluation.The results showed that compared with the control（CK），the combined stress of Zn+ MBT had a significant effect on the antioxidant system and photosynthetic pigments，and the variation range was 19.70%-38.07% . The dry weight，chlorophyll a and root activity of different varieties of ryegrass decreased to varying degrees. Compared with CK，it decreased by 24.24% ， 19.51% and 21.17% ，respectively. The content of malondialdehyde （MDA）and proline increased significantly，which were 32.12% and 22.99% higher than CK，respectively. The soluble protein content and superoxide dismutase（SOD）activity of different varieties of ryegrass were 21.11% and 0.39% higher than CK，respectively. Ryegrass responded to Zn+MBT compound stress by adjusting physiological indexes and antioxidant enzyme system，and the degree of response of diferent varieties of ryegrass was also diferent. The comprehensive response index was used to evaluate the tolerance of 20 varieties. The results showed that‘Quijote’showed high tolerance to Zn+MBT combined stress，while‘Turfgold’was the most sensitive one. The results of this study can provide information for the remediation of Zn+ （204號 MBT pollution by ryegrass.

Key words：Lolium perenne L. ;Compound stress;2-Mercaptobenzothiazole;Tolerance

鋅（Zn）和苯并噻唑類化合物作為輪胎的添加劑成分，兩者往往同時或先后進入環(huán)境形成復合污染，在各環(huán)境介質中廣泛存在[1-2]。（剩余14726字）