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Morpho-Anatomy and Physiology of Red Galangal (Alpinia Purpurata) and White Galangal (Alpinia Galanga) Under Some Salinity Stress Levels

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Morpho-Anatomy and Physiology of Red Galangal (Alpinia Purpurata) and White Galangal (Alpinia Galanga) Under Some Salinity Stress Levels BIODIVERSITAS ISSN: 1412-033X Volume 19, Number 3, May 2018 E-ISSN: 2085-4722 Pages: 809-815 DOI: 10.13057/biodiv/d190308 Morpho-anatomy and physiology of red galangal (Alpinia purpurata) and white galangal (Alpinia galanga) under some salinity stress levels TIA SETIAWATI1, ANIS SUSILAWATI1, ASEP ZAINAL MUTAQIN1, MOHAMAD NURZAMAN1, ANNISA1, RUHYAT PARTASASMITA1,, KARYONO1 4Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran. Jl. Raya Bandung-Sumedang Km. 21 Jatinangor, Sumedang 45363, West Java, Indonesia. Tel./fax.: +62-22-7796412, ♥email: [email protected]; [email protected] Manuscript received: 14 December 2017. Revision accepted: 16 April 2018. Abstract. Setiawati T, Susilawati A, Mutaqin AZ, Nurzaman M, Annisa, Partasasmita R, Karyono. 2018. Morpho-anatomy and physiology of red galangal (Alpinia purpurata) and white galangal (Alpinia galanga) under some salinity stress levels. Biodiversitas 19: 809-815. Soil salinity is one of the most urgent issues in agriculture as it can reduce plant growth and productivity. Efforts on development of galangal plant on saline soils are still encountering some obstacles such as lack of information on the galangal types that are tolerant to saline condition. The purpose of this study was to determine morpho-anatomical and physiological responses of red galangal (Alpinia purpurata (Vieill.) K. Schum.) and white galangal (Alpinia galanga (L.) Willd.) to salinity stress treatments. This research used a Randomized Block Design (RBD) assigned in a factorial treatment design of two factors, i.e., (i) species of galangal consisting of two levels i.e., red galangal and white galangal, (ii) NaCl concentration consisting of five levels, i.e., 0‰, 3‰, 6‰, 9‰ and 12‰. Each treatment was three replicates. Observation was done on the growth parameters when the plants showed wilting symptoms. The observed data were subjected to Analysis of Variance (ANOVA), followed by a post hoc Duncan Multiple Range Test (DMRT) at α 5% when the treatment effect was significant. The results showed that salinity stress treatment significantly reduced the plant height increase, leaf area, dry weight, stomata density, chlorophyll content and increased thickness of root epidermis, and proline content in both species of galangal. Red galangal was more tolerant than white galangal. Keywords: Galangal, morpho-anatomy, physiology, salinity stress INTRODUCTION (Yuwono 2009), such as saline soil (Akbar 2010). Saline soil is a soil containing high dissolved NaCl salt with a pH Galangal is one of the herbal ingredients that have been of <8.5 and electrical conductivity of > 4 mmhos/cm so widely used by the community as traditional medicine. The that it can interfere the plant growth (Follet et al. 1981), utilization of galangal as a herbal medicine material is and consequently, it can decrease crop productivity. increasingly widespread along with the discovery of its Salinity affects many physiological and morphology various biological activities such as immunomodulator processes of a plant by affecting the osmotic potential of (Weidner et al. 2007), high blood pressure lowering soil solution and ion absorption and mineral accumulation capacity, and fertility enhancer by increasing the number (Ramezani et al. 2011). Salinity induces a variety of and motility of sperm (Chudiwal et al. 2010). Active disorders at the cellular and whole plant levels. Salinity substances of acetoxychavicol acetate (ACA) contained in stress is produced from a number of adverse processes galangal can inhibit the development of HIV (Ying and including the toxicity of Na + and Cl-ion, the impairment of Baoan 2006), and can serve as antitumor, antioxidant and mineral nutrition, water status modification of plant tissue antimicrobial (Vankar et al. 2006). There are two kinds of and secondary stresses such as an oxidative stress galangal, i.e., the white tuber galangal called white associated with the production of toxic reactive oxygen galangal (Alpinia galanga (L.) Willd) commonly used as intermediates (Bajji et al. 1998). As reported by Munns and food seasonings and the red tuber galangal called red Tester (2008) that salt stress on plants leads to a reduction galangal (Alpinia purpurata (Vieill.) K. Schum) used as in growth as a consequence of some physiological medicine (Lestari 2005). responses, including alterations of ion balance, water The development of traditional medicine industry and status, mineral nutrition, stomatal behavior, photosynthesis other industries using galangal as raw material causes efficiency, and allocation and utilization of carbon. Soil galangal demand tends to increase in the recent years, salinity can affect plant growth both physically (osmotic which necessitates cultivation efforts that can ensure the effects) and chemically (nutrients and/or toxicity effects). continuous availability of galangal. One of the attempts to Plants will be more difficult to absorb water as the soil increase the galangal production is by expanding the salinity content increases. Sensitive plants appeared planting area. Land that has good prospects for agricultural suffering from drought even though the salt content is quite development is marginal land, but technological innovation low. There is usually a progressive decrease in growth and is required to improve the productivity of the marginal land yield as salinity increases (Ogle and John 2010). 810 BIODIVERSITAS 19 (3): 809-815, May 2018 In general, the response of plants to salinity can be seen (Ramezani et al. 2011). Field capacity (FC) was determined from the morphology, anatomy, and physiology based on a gravimetric method using the following characteristics that are closely related to the production of formula: FC = WW-DW)/DW x 100%, where WW = wet plants in water-shortage environments (Li et al. 2006). Salt weight and DW = dry weight of soil. Pots with dry soil tolerant plants are able to minimize adverse effects by were weighed to obtain dry weight and were watered to a producing a series of anatomical, morphological and saturated level, allowed to drain for 24 hours and weighed physiological adaptations (Hameed and Ashraf 2008). again. Under high salt content, especially chloride and sodium, plants modify their anatomical properties. This is caused by Parameter measurement osmotic effects and ionic imbalances that affect plants Observations were made on the plant growth metabolism. Anatomically, it affects cell division and parameters when plants showed the symptom of wilting. expansion process and reduces the size of meristem, cortex The parameters observed were morphological, anatomical and vascular cylinder (Singh and Chaturvedi 2014) to and physiological characteristics including plant height minimize the detrimental effects of salt stress (Younis et al. increase, leaf area, plant dry weight, stomata density, 2014). thickness of root epidermis, thickness of root cortex, root One of the efforts in the management of saline land is trachea number, chlorophyll and proline contents. Plant by using plant species that have good adaptation and height increase is the difference between the plant height at tolerance to high salt content. Research on salinity has been the start of the treatment applied and that at the end of widely carried out but information on the effect of salinity observation. The initial plant height was measured at the on Zingiberaceae plant growth, especially galangal, has not time of drought stress treatment was applied while the final been reported. Therefore, it is necessary to study the effect plant height was measured when the plant showed wilting of salinity on the growth of red galangal plants (A. symptoms (24 days after the treatment was applied). Leaf purpurata) and white galangal (A. galanga) based on area was measured using a leaf area meter CI-202 portable morphological, anatomical and physiological laser. Dry weight was measured by drying the plant characteristics as indicators for identification of saline materials in an oven at a temperature of 70C to obtain a tolerant types of galangal. constant weight. Chlorophyll content was measured with chlorophyll meter Opti-Science CCM-20. The stomata density was observed using transparent nail polish applied MATERIALS AND METHODS to the leaf surface. The nail polish was spread to a small portion of the lower surface of the leaf and then peeled Materials away slowly. Replica of stomata was examined under a The seedlings of red galangal and white galangal were light microscope with a magnification of 400 x (Shrestha obtained from Horticultural Seed Center, Department of and Kang 2016). Root anatomical observations included Food Crops and Horticulture, Hegarmanah Village, the thickness of epidermis and the thickness of cortex that Jatinangor Sub-district, West Java Province. Planting were performed by making fresh preparations of the medium used consisted of a mixture of sand and manure (2: transverse incision of the roots and observed under a light 1). NaCl solution was used for salinity stress treatments. microscope. Proline content was measured following the method by Bates et al. (1973). Leaf samples of 0.5 g were Methods extracted with a 3% sulfo-salicylate solution. The filtrate This research used a Randomized Block Design (RBD) was reacted with ninhydrin reagent, and then extracted with and a factorial treatment design. The treatments design toluene. The red toluene containing proline was separated included two factors: (i) species of galangal
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