Anatomical evaluation of recovery capacity in two DM-2 and H158A/H543R oilseed sunflower lines under drought stress

Articles in Press

Document Type : Research Paper

Authors

Department of Plant Production and Genetics, Faculty of Agriculture, Urmia University, Urmia, Iran

Abstract

In this study, the anatomical evaluation of two sunflower lines DM-2 and H158A/H543R was done based on a completely randomized design with three replications at the 8-leaf stage under normal and drought stress of 30% of the pot capacity. For this purpose, the thickness of the collenchyma, epidermis, brain parenchyma and skin parenchyma tissues of the stem was measured after staining using a reticulated lens and optical microscope in each one of normal and drought stress conditions and the number of cells in collenchyma tissue layer was counted. The anatomical comparison of two tolerant and sensitive lines of sunflower was also done after recovery. The results of analysis of variance showed the influence of stem anatomy from stress conditions. Epidermal and brain parenchyma tissues showed the highest thickness in the tolerant line under normal conditions. The highest thickness of skin parenchyma tissue was observed in the tolerant line under drought stress conditions as well as in the sensitive line under normal conditions. In the recovery conditions, a significant difference was observed in the thickness of epidermis, brain parenchyma and skin parenchyma tissues of studied lines. The results showed that the tolerant line has the highest thickness of skin parenchyma tissue, so the increase of skin parenchyma tissue is confirmed as part of the important mechanisms of irreversible resistance.

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Main Subjects

Iranian Journal of Field Crop Science

Articles in Press, Accepted Manuscript
Available Online from 24 November 2024

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History

  • Receive Date: 29 February 2024
  • Revise Date: 21 May 2024
  • Accept Date: 22 May 2024
  • Publish Date: 24 November 2024

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