不同重金屬離子影響下番茄種子的萌發及幼苗生長研究

劉茵　梁峰

摘 要：以番茄（Solanum lycopersicum）種子為試驗材料，研究在不同重金屬離子（鎘、鋅）影響下，番茄種子萌發過程中的發芽勢、發芽率、活力指數、根長等變化情況，并探討了鎘（Cd）、鋅（Zn）、鎘+鋅（Cd+Zn）對番茄種子的毒性效應。結果表明：隨著重金屬處理濃度的增加，番茄種子的發芽率、發芽勢、根長、芽長、苗長和活力指數均顯著下降，差異顯著。鋅、鎘以及鋅+鎘混合處理均對番茄種子的萌發起到了有效的抑制作用。研究結果對重金屬污染土壤中番茄種子的萌發和定植具有重要的理論和實踐意義。

關鍵詞：重金屬離子;番茄;種子萌發;幼苗生長

中圖分類號 S641.2? 文獻標識碼 A文章編號 1007-7731（2021）17-0099-03

Effects of Different Heavy Metal Ions on Seed Germination and Seedling Growth of Solanum lycopersicum

LIU Yin et al.

（Department of Life Science， Shangqiu Normal University， Shangqiu 476000， China;Biorefinery Engineering Lab of Henan Province，Shangqiu Normal University，Shangqiu 476000，China）

Abstract： Solanum lycopersicum seeds were used as the materials in this experiment， and the changes of germination vigor， germination percentage， vigor index and root length were recorded during the germination of seeds under the influence of different heavy metal ions Cd（superscript 2+） and Zn （superscript 2+） . The toxic effects of Zn （superscript 2+）， Cd（superscript 2+） and Zn+Cd （superscript 2+） on seeds were investigated. The results showed that the germination rate， germination potential， root length， shoot length， seedling length and vigor index of solanum lycopersicum seeds decreased significantly with the increase of heavy metal concentration. Zn （superscript 2+）， Cd（superscript 2+） and Zn+Cd （superscript 2+） could inhibit the germination of seeds effectively. The study has important theoretical and practical significance for seed germination and colonization of Solanum lycopersicum in heavy metal contaminated soil.

Key words： Heavy metal ion; Solanum lycopersicum; Seed germination; Seedling growth