| Autor: |
Rahat QUA; Department of Botany, University of Sargodha, Sargodha, Pakistan., Hameed M; Department of Botany, University of Agriculture, Faisalabad, Pakistan., Fatima S; Department of Botany, The Government Sadiq College Women University, Bahawalpur, Pakistan., Ahmad MSA; Department of Botany, University of Agriculture, Faisalabad, Pakistan., Ashraf M; University of Agriculture, Faisalabad, Pakistan., Ahmad F; Department of Botany, University of Agriculture, Faisalabad, Pakistan., Khalil S; Department of Forestry, Range & Wildlife Management, The Islamia University of Bahawalpur, Pakistan., Munir M; Department of Botany, The Government Sadiq College Women University, Bahawalpur, Pakistan., Shah SMR; Department of Botany, University of Agriculture, Faisalabad, Pakistan., Ahmad I; Department of Botany, University of Sargodha, Sargodha, Pakistan., Younis A; Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan. |
| Abstrakt: |
Micro and macro-morphological features contribute to plants' tolerance to a variety of environmental pollutants. The contribution of such structural modifications in the phytoremediation potential of Diplachne fusca populations collected from five saline habitats were explored when treated with 100 to 400 mM NaCl for 75 days along with control. Structural modifications in the populations from the highest salinity included development of aerenchyma in stem instead of chlorenchyma, absence of excretory hairs in stem, and exceptionally large trichomes on the leaf surface to help excretion of excess salt. Large parenchyma cells provided more space for water and solute storage, while broad metaxylem vessels were linked to better conduction water and nutrients, which ultimately excreted via glandular hairs, microhairs, and vesicular hairs. Broad metaxylem vessels and exceptionally long hairs observed in the populations collected from 52 dS m -1 . In conclusion, large stem aerenchyma, exceptionally large trichomes on the leaf surface, and tightly packed outer cortical region in roots with intensive sclerification just inside the epidermis accompanied with salt excretion via glandular hairs, microhairs, and vesicular hairs were the main anatomical modifications involved in the phytoremediation potential of D. fusca in hyper-saline environments. |
