<abstract xmlns="http://www.w3.org/1999/xhtml">

<p><italic>Periploca angustifolia</italic> (Labill.) is a multipurpose xerophytic shrub in the Apocynaceae, which is widely disturbed in arid zones. This shrub is often used in programs for the rehabilitation of degraded areas, so it is essential to investigate the impact of environmental factors (drought, burial depth) on seed germination patterns. During 20 days, germination responses of seeds were determined over a wide range of constant temperatures (25 °C), polyethylene glycol PEG-6000 solutions of different osmotic potentials (0 to -1.6 MPa), and burial depths (1–8 cm). The highest germination percentages (99%) were obtained under control conditions without PEG, and increasing osmotic pressure progressively inhibited seed germination, which was about 2% at -1.6 MPa. When seeds were buried deep, there was a significant decrease in seedling emergence percentage and rate. Seedlings of <italic>P. angustifolia</italic> emerged well at depths of 1–2 cm with the highest emergence percentage of 74 and 69%, respectively. They could not emerge when the sand burial depth was higher than 4 cm.</p>
</abstract>

Periploca angustifolia (Labill.) is a multipurpose xerophytic shrub in the Apocynaceae, which is widely disturbed in arid zones. This shrub is often used in programs for the rehabilitation of degraded areas, so it is essential to investigate the impact of environmental factors (drought, burial depth) on seed germination patterns. During 20 days, germination responses of seeds were determined over a wide range of constant temperatures (25 °C), polyethylene glycol PEG-6000 solutions of different osmotic potentials (0 to -1.6 MPa), and burial depths (1–8 cm). The highest germination percentages (99%) were obtained under control conditions without PEG, and increasing osmotic pressure progressively inhibited seed germination, which was about 2% at -1.6 MPa. When seeds were buried deep, there was a significant decrease in seedling emergence percentage and rate. Seedlings of P. angustifolia emerged well at depths of 1–2 cm with the highest emergence percentage of 74 and 69%, respectively. They could not emerge when the sand burial depth was higher than 4 cm.

Effect of Water Deficit and Burial Depth on The Germination of <italic>Periploca angustifolia</italic>

Research unity of Plant Biology and Ecophysiology

Faculty of Sciences of Sfax, University of Sfax

Ekológia (Bratislava)

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Effect of Water Deficit and Burial Depth on The Germination of 

Periploca angustifolia (Labill.) is a multipurpose xerophytic shrub in the Apocynaceae, which is widely disturbed in arid zones. This shrub is often used in...

Effect of Water Deficit and Burial Depth on The Germination of Periploca angustifolia

Published Online: Jun 04, 2024

Page range: 26 - 33

Received: Dec 23, 2022

Accepted: Sep 05, 2023

DOI: https://doi.org/10.2478/eko-2024-0003

Keywords
burial depth, osmotic potential, seed germination, seedling emergence,

© 2024 Fairouz Dghim et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Effect of Water Deficit and Burial Depth on The Germination of Periploca angustifolia

Published Online: Jun 04, 2024

Page range: 26 - 33

Received: Dec 23, 2022

Accepted: Sep 05, 2023

DOI: https://doi.org/10.2478/eko-2024-0003

Keywordsburial depth, osmotic potential, seed germination, seedling emergence,

© 2024 Fairouz Dghim et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
burial depth, osmotic potential, seed germination, seedling emergence,