Changes in henna (Lawsonia inermis L.) morphological traits under different deficit irrigations in the southern Tunisia

Authors

  • Hanen Enneb Laboratory of Dryland and Oasis Cropping, Institute of Arid Zone of Medenine, ElFjè, Medenine 4119, Tunisia
  • Aicha Belkadhi Department of Biology, Unité de Recherche de Physiologie et Biochimie de la tolérance des plantes aux contraintes abiotiques, Faculty of Sciences of Tunis, University of Tunis El Manar, 1060 Tunis, Tunisia http://orcid.org/0000-0001-5911-0974
  • Ali Ferchichi Laboratory of Dryland and Oasis Cropping, Institute of Arid Zone of Medenine, ElFjè, Medenine 4119, Tunisia

DOI:

https://doi.org/10.14719/pst.2015.2.1.92

Keywords:

Lawsonia inermis, water stress, leaf area, total leaf number, stem length

Abstract

Henna plant belongs to continental oases where water shortage constitutes the essential limiting factors of its agricultural production. Lawsonia inermis L. (Lytraceae) is often exposed to severe drought stress in Gabes; a Tunisian arid region. The present study was carried out to evaluate the impact of water stress on the morphology of Tunisian henna plants. Thus, an experiment of four months was carried out under greenhouse at the Institute of Arid Region in Medenine, Tunisia. Henna was exposed to three different irrigation regimes, whereby the plants where irrigated to field capacity (control, T0), 50% of the control (moderate stress, T1) and 25% of the control (severe deficit irrigation, T2). Results showed that, leaf area (LA), leaf number and stem length of henna, decreased in response to the studied stress. The effect of water stress was clearly observed on those parameters. Moderate drought (T1) did not damage henna morphology, and the plants grew better than without water limitation (T0). Furthermore, the water stress-typical responses were shown as time and severity dependent in all the measured parameters. Indeed, lowest water availability treatment (T2) induced significant decrease in total number of leaves, as well as reductions in LA. Under this severe water stress (T2); LA was reduced by 65.79%, compared to control, at 60 days after the initiation of the bioassay. Stem length decreased significantly in the most severe water stress, this reduction was about 44%. Globally, we conclude that henna plant growth decreased progressively to long-term water limitation.

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Author Biographies

Hanen Enneb, Laboratory of Dryland and Oasis Cropping, Institute of Arid Zone of Medenine, ElFjè, Medenine 4119, Tunisia

Institute of Arid Zone of Medenine, ElFjè, Medenine

Aicha Belkadhi, Department of Biology, Unité de Recherche de Physiologie et Biochimie de la tolérance des plantes aux contraintes abiotiques, Faculty of Sciences of Tunis, University of Tunis El Manar, 1060 Tunis, Tunisia

In 2009, I obtained a Master`s degree in Environmental Physiology and Toxicology in the Department of Biology/Faculty of Science (University of Tunis El Manar, Tunisia). Then, in 2010-2011, I moved to Córdoba (Spain) and joined the Department of Agronomy and Plant Breeding (CSIC/Institute of Sustainable Agriculture; Prof Antonio De Haro) in a pre-doctoral training to study the flax and Brassica carinata response to abiotic stresses. The main goal was to understand how the plants adapt to environmental stresses in polluted soils (toxic metals). This knowledge was necessary to select tolerant species and help to develop strategies for improving tolerance of plants in contaminated areas. This work was further extended during another pre-doctoral fellowship at the Department of Plant Genetics in Pontevedra (CSIC/Misión Biológica de Galicia; Dr. María Elena Cartea). Major findings were the revelation of the role played by salicylic acid in membrane lipids during cadmium stress.  We have found that when grown in the presence of up to 100 µM CdCl2, salicylic acid is able to restrict cadmium transport from the roots to the leaves limiting its toxicity in the photosynthetic tissues. Salicylic acid-induced Changes in membrane lipid composition (glycolipids, phospholipids and neutral lipids), photosynthesis and antioxidant capacities have been also reported in contaminated plants.

 

      In 2011-2012, I moved toEdmonton(Canada) and started studying the mechanisms of transcription in plants in the Department of Biological Sciences/Faculty of Science (UniversityofAlberta, Prof Michael Deyholos). I have been trained in extraction, purification, and separation of proteins for proteomics, growth and stress treatment of plant samples, and gene expression studies. Since 2012, we still continue to study the role of the chloroplast 2-Cys peroxiredoxinBAS1 in the protection of flax against oxidative damages.

      In 2014, I obtained my Doctorate Degree in Biological Sciences.

Ali Ferchichi, Laboratory of Dryland and Oasis Cropping, Institute of Arid Zone of Medenine, ElFjè, Medenine 4119, Tunisia

Institute of Arid Zone of Medenine, ElFjè, Medenine

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Published

01-01-2015

How to Cite

1.
Enneb H, Belkadhi A, Ferchichi A. Changes in henna (Lawsonia inermis L.) morphological traits under different deficit irrigations in the southern Tunisia. Plant Sci. Today [Internet]. 2015 Jan. 1 [cited 2024 Nov. 21];2(1):2-6. Available from: https://horizonepublishing.com/journals/index.php/PST/article/view/92

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