Germination Strategies of Some Accessions of Allium roseum L. Collected from Different Bioclimatic Areas of Southern Tunisia

Persian shallot (Allium altissimum Regel.) was grown under fully irrigated conditions in a 2-year-field experiment (2010-2012) in the northeast of Iran to study and determine (i) radiation and nitrogen-use efficiency, (ii) growth analysis, (iii) carbon partitioning, and (iv) biomass production under different rates of nitrogen and cultivated bulb weights. The field experiment was performed as a randomized complete block design with a factorial arrangement of four nitrogen levels (control (100), 200, 250, and 300 kg ha-1) and two levels of cultivated bulb weight (10-20 and 20-30 g) with three replications in both years of the experiment. Our results showed that increasing the nitrogen rate and bulb weight significantly enhanced Persian shallot production. Radiation-use efficiency (1.06 to 1.27 g MJ-1), maximum crop growth rate (8.3 to 11.2 g m-2 d-1), and maximum leaf area index (1.3 to 2.6) showed a positive correlation with nitrogen rate and bulb weight. Nevertheless, nitrogen-use efficiency (0.87 to 2.38 g bulb per g nitrogen) indicated a negative relationship with applied nitrogen rate. Moreover, increasing the nitrogen application rate increased the carbon allocation to above-ground organs. On the other hand, nitrogen limited conditions increased the carbon allocation to underground organs and carbon remobilization from stem and leaves to bulbs during the late growth season. Increasing the nitrogen application rate and bulb weight may be appropriate practices for enhancing Persian shallot production; however, evaluation of the impact of nitrogen on the quality of bulbs needs to be investigated.

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Seed morphogenesis and effect of pretreatments on seed germination of Persian shallot (Allium hirtifolium Boiss.), an endangered medicinal plant

Ebrahimi

Hassandokht

Zamani

et al. 2014

Hortic. Environ. Biotechnol.

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This study was conducted to evaluate seed morphogenesis and effect of pretreatments on seed germination of Persian shallot or mooseer (Allium hirtifolium Boiss.). In a first experiment, seed developmental stages of Persian shallot (Mooseer) were assessed. Results showed that number of ovules varied among locules and flowers. In most cases 3-4 ovules occurred per locule and developed into 1-2 seeds and therefore, a ripe capsule usually contained 3-6 seeds. The seeds were black in color and ranged from 3.73-3.98 mm in length and 2.75-3.16 mm in width, and the average weight of 1,000 seeds varied between 7.80-8.20 grams. In a second experiment four factors, scarification, stratification, potassium nitrate, and GA(3), were evaluated for seed germination. Results showed that seed germination was not observed without sandpaper scarification or stratification treatment. It could be concluded that the best treatment for overcoming mooseer seed dormancy and getting the longest seedling length was scarification with sandpaper, GA(3) (500 mg L-1 for 12 hours) application, and moist stratification. The results obtained in the present study revealed that mooseer seed has mechanical dormancy and only cold stratification is needed for endosperm weakening

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Germination Strategies of Some Accessions of Allium roseum L. Collected from Different Bioclimatic Areas of Southern Tunisia

Cited by 7 publications

References 27 publications

Salinity and drought stresses improve antioxidant potential of Allium roseum L., an edible medicinal plant

Salinity and drought stresses improve antioxidant potential of Allium roseum L., an edible medicinal plant

Nitrogen and cultivated bulb weight effects on radiation and nitrogen-use efficiency, carbon partitioning and production of Persian shallot (Allium altissimum Regel.)

Seed morphogenesis and effect of pretreatments on seed germination of Persian shallot (Allium hirtifolium Boiss.), an endangered medicinal plant

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