Study of Some Foxtail Lilies Species (Eremurus M. Bieb.) Grown in the North-East of Romania
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Copyright © 2020 University of Bucharest Rom Biotechnol Lett. 2020; 26(2): 2489-2498 Printed in Romania. All rights reserved doi: 10.25083/rbl/26.2/2489.2498 ISSN print: 1224-5984 ISSN online: 2248-3942 Received for publication, August, 3, 2020 Accepted, December, 15, 2020 Original paper Study of some foxtail lilies species ( Eremurus M. Bieb.) grown in the North-East of Romania CEZAR BAHRIM1, FRANCISCO JOSÉ GARCÍA–BREIJO2, MARIA APOSTOL1,*, ADRIAN CONSTANTIN ASĂNICĂ3, GABRIEL CIPRIAN TELIBAN1, NECULAI MUNTEANU1, LILIANA ROTARU1, LUCIA DRAGHIA1,* 1“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Faculty of Horticulture, 3 Mihail Sadoveanu Alley, 700490, Iași, Romania 2Polytechnic University of Valencia, School of Agricultural Engineering and Environment (ETSIAMN), Dept. of Agroforest Ecosystems, Camino de Vera s/n. 46022, Valencia, Spain 3University of Agronomic Sciences and Veterinary Medicine, Faculty of Horticulture, 59 Mărăşti Bd., 011464, Bucharest, Romania Abstract Three species of Eremurus M. Bieb. grown at UASVM Iasi, Romania, were studied: E. himalaicus Baker, E. robustus Regel and E. stenophyllus (BOISS. & BUHSE) Bak. Some ornamental (morphologic and phenologic) features were analyzed and also the anatomic structure of the leaf, the content of photosynthetic pigments and the enzymatic activity of the leaves. The biometrical and phenological determinations indicate a good ecological adaptability of the plants, in accordance with similar reports. The anatomical differences between the three species are not very great, but the stomata in E. stenophillus and E. himalaicus are arranged at the same level as the epidermal surface while in E. robustus they are arranged a little lower, and the assimilating parenchyma layer is more developed in E. stenophillus and E. himalaicus than in E. robustus. At E. robustus and E. himalaicus a larger content of assimilatory pigments and a more reduced enzymatic activity were observed. Keywords Desert candle, ornamental, anatomy, APX, photosinthetic pigments. To cite this article: BAHRIM C, BREIJO FJG, APOSTOL M, ASĂNICĂ AC, TELIBAN GC, MUNTEANU N, ROTARU L, DRAGHIA L. Study of some foxtail lilies species (Eremurus M. Bieb.) grown in the North-East of Romania. Rom Biotechnol Lett. 2020; 26(2): 2489-2498. DOI: 10.25083/rbl/26.2/2489.2498 *Corresponding author: LUCIA DRAGHIA, Phone: 0743171879; e-mail: [email protected] MARIA APOSTOL, Phone: 0765674556; e-mail: [email protected] CEZAR BAHRIM et al The experience included three variants (each species Introduction representing a variant) distributed in a randomized blocks design with three repetitions (10 plants/repetition). All Eremurus M. Bieb. (foxtail lily, desert lily or desert plants were grown under the same management of ferti- candle) is a genus of Asphodelaceae family, with centre of lization, watering, soil and disease control. diversity in Central Asia (HEDGE & WENDELBO, cited by NADERI & al [1]) and distributed over large area in Local conditions Central Asia, Caucasia, Afghanistan, Iran, Pakistan, Iraq, The experimental field is located in NE of Romania, Turkey, Lebanon, India and China (WENDELBO & Iasi area, at 47°11’ North latitude and 27°33’ East FURSE, cited by NADERI & al [1]). longitude, in temperate-continental climat, with excessive Foxtail lilies are geophyte plants, with tuberous nuances, on a chernozem cambic soil with sandy-loam roots and a corm-like crown with renewal buds texture and pH 7.8. The investigations were carried (SCHIAPPACASSE & al [2]). Roots are shaped like an during 2014-2020 period. The meteorological conditions octopus, are fragile and do not like to be disturbed after from the analyzed period (especially the spring and planting. Linear leaves forming tufts or rosettes. Leaves summer beginning temperatures) registered differences die back in mid-summer after flowering as the plant from one year to another. In the years 2014-2020, the goes into dormancy (CANTOR & al [3]; HORŢ & al [4]). averages of the temperatures from March, when the foxtail The inflorescences are racemes, usually dense, elongated, lily start in vegetation, were, in most cases, over the multi- not branched, with many flowers in copper, bright yellow, annual average (3.9°C), with values between 1.9 and 7.2°C. snow white, pastel pink, orange or any combination of Only in 2018, the average temperature of March was under the multi-annual average (with 2.8°C). Also, April those colors. The perianth has six tepals, with conspicuous has the same tendency of exceeding the multi-annual stamens. Fruit a dehiscent loculicidal capsule. Seeds temperature which characterized the conditions from irregularly 3-angled (POLLOCK & GRIFFITHS [5]; Iasi (10.5°C), but with smaller differences (0.2-4.8°C). BRICKELL & CATHEY [6]). The harsh conditions of The months of April from 2015 and 2017 were colder. the place of origin have given these plants a very high Regarding the precipitations, in March, precipitations resistance to lack of water and strong insolation, as well exceeded the multi-annual only in 2015, 2017 and 2018, as the ability to withstand, through their underground in other years the weather was droughty. The biggest deficit organs, the low temperatures during the winter. was registered in 2019 (8.1 mm as opposed to 30.9 mm Although there are studies on the taxonomy, ecology, the multi-annual average). April was more droughty, morphology, cytology, anatomy, decorative traits etc. especially during the last three years (6.4 mm, in 2018, (NADERI SAFAR & al [1] [7] 2009, 2014; KUMARI & al 6.9 mm, in 2019 and 1.8 mm in 2020, as opposed to the [8]; SCHIAPPACASSE & al [2]; MUSHTAQ & al [9]; multi-annual of 46.1 mm). TIAN & MA [10]), the literature on the genus Eremurus is not very extensive. In Romania, the literature makes less Biometrical and phenological investigations reference to foxtail lilies, although they are mentioned, The examination of the morphological and pheno- long ago, in the floral assortment (KISELEV [11]; logical characters was done on the plants from the PREDA [12]; PREDA [13]; ŞELARU [14]); TOMA [15]; collection. The morphometric determinations were: total BAHRIM & al [16], [17]). height of the floral stem, length and diameter of inflores- cence, number of flowers in inflorescence, and flower The objectives of this study were to analyze some diameter. The results were compared to the average of morphological, phenological, biochemical and anatomical the variants (considered control) and the interpretation aspects in three Eremurus species grown in the ecological was made using the variance analysis, with the LSD test conditions of Iasi, Romania. (SĂULESCU & SĂULESCU [18]). The main phenological stages analyzed were: Material and Methods starting in the vegetation, the appearance of floral stems, the beginning of flowering, and end of flowering. Plant material The study was carried out at University of Anatomical study Agricultural Sciences and Veterinary Medicine, Faculty Performing anatomical sections were done by using of Horticulture, of Iasi, Romania. Three species of the technique by freezing of the tissues. A part of the Eremurus have been studied: E. himalaicus Baker, samples (leaves) were placed in a freezing microtome E. robustus Regel and E. stenophyllus (BOISS. & BUHSE) (CM 1325; Leica, Germany) and sliced into sections of Bak. Establishment of experimental cultures in the field 20-30 µm. The sections were stained with FSA (Basic was made during the autumn of the year 2013, with Fuchsin, Safranin and Astra Blue) for 5 min, washed underground organs purchased from the company JUB with water and mounted for observation under optical HOLLAND (Holland). microscopy (OLYMPUS Provis AX 70 optical microscope), 2490 Study of some foxtail lilies species ( Eremurus M. Bieb.) grown in the North-East of Romania equipped with an infinity 2-3C Lumenera® digital camera and analyzed with “Infinity Analyze” Software v.6.5.5 The determination of ascorbate peroxidase (APX) at the Plant Anatomy Laboratory “Julio Iranzo”, in the by spectrophotometric method Botanical Garden of the University of Valencia. On the To determine the activity of ascorbate peroxidase other hand, another part of the leaves, fixed in FAA, were (APX), 0.5 g of plant material was ground on ice in washed three times with 0.01 M PBS, pH 7.4, for 15 min K phosphate buffer with a pH of 7.0. To obtain the super- each. Thereafter, dehydrated at room temperature in natant from which the enzymatic activity was analyzed, a graded series of ethanol, starting at 50% and increasing the extract obtained from milling was centrifuged at to 70%, 95% and 100%, for no less than 20-30 min 12,000 rpm for 20 minutes, at 4°C. at each step. The fixed and dehydrated samples were The APX activity was determined according to embedded in Spurr’s resin, according to the manufacturer’s the method of CHEN & ASADA [23] by monitoring the instructions (http://www.emsdiasum.com/microscopy/ decrease in absorbance at 290 nm. The reaction mixture technical/datasheet/14300.aspx). For light microscopy (3 ml) consisted of 1.5 ml of phosphate buffer (pH 7.0), analyses, 1-2 μm sections were cut from samples 300 μl of ascorbic acid, 600 μl of H O and 600 μl of embedded in Spurr’s resin using a diamond knife 2 2 enzyme extract. (DIATOME Histo 45°) and an ultramicrotome (Ultra- tome Nova LKB Bromma). The sections were stained One unit of enzyme activity was calculated as the with 1% toluidine blue and observed with an Olympus amount of enzyme required for the oxidation of 1.0 mM Provis AX 70 microscope equipped with an Infinity 2-3C ascorbate/min/g fresh substance. The enzymatic activity Lumenera® digital camera and ‘‘Infinity Analyze” Soft- was calculated according to the following equation: ware v.6.5.5. at the Plant Anatomy Laboratory “Julio Enzymatic activity (units/min/g fresh substance) = Iranzo”, in the Botanical Garden of the University of change in absorbance/minutes * total volume (ml) Valencia (SANTAMARINA SIURANA & al [19]; [20]).