TOLERANȚA GENOTIPURILOR DE SUSAN (SESAMUM INDICUM L.) LA STRESUL HIDRIC ÎN CONDIȚIILE MODELĂRII LUI ARTIFICIALE

Anatolii MOGÎLDA

Abstract


În lucrare sunt prezentate rezultatele cercetării reacției comparative a unui set din 40 de soiuri și linii de susan la acțiunea stresului hidric creat prin modelarea lui în condiții de laborator. Inițial, pe semințele a 5 mostre au fost testate diverse concentrații de polietilenglicol PEG 6000 (5%, 10%, 15%, 20% și 25%) în scopul determinării condiției optimale de efectuare a evaluărilor. S-a stabilit că pentru elucidarea toleranței la secetă a mostrelor de colecție trebuie utilizată concentrația de 15% de PEG 6000. În urma studiului efectuat s-a ajuns la concluzia că din numărul total de genotipuri estimate 5 pot fi considerate cele mai rezistente, având gradul de inhibiție la mostrele de susan cuprins între 41,98 și 51,71%; pentru 13 mostre considerate tolerante gradul de inhibiție variază de la 53,56 la 60,71%; la 11 mostre cu stabilitate mică a funcțiilor în timpul stresului și capacitate de reversie mare gradul de inhibiție este cuprins între valorile 61,78% și 68,49% și la 11 mostre sensibile cu stabilitate mică și capacitate mică de restabilire a funcțiilor gradul de inhibiție este cel mai mare – cu valori de la 69,39 la 77,02%.

 

SESAME GENOTYPES (SESAMUM INDICUM L.) TOLERANCE IN HYDRIC STRESS IN
THE CONDITIONS OF ARTIFICIAL MODELLING

The paper presents the results of the research of the comparative reaction of a set of 40 sesame varieties and lines to the action of the water stress created by its modelling in laboratory conditions. Initially, various concentrations of polyethylene glycol PEG 6000 (5%, 10%, 15%, 20% and 25%) were tested on the seeds of 5 samples in order to determine the optimal condition for carrying out the evaluations. It was established that for the elucidation of the drought tolerance of the collection samples, the concentration of 15% of PEG 6000 should be used. Following the study, it was concluded that out of the total number of estimated genotypes, 5 can be considered the most resistant, with the degree of inhibition included. Between 41.98-51.71%, for 13 samples considered tolerant, the degree of inhibition varies from 53.56 to 60.71%, in 11 samples with low stability of functions during stress and high reversal capacity, the degree of inhibition is between 61,78% - 68,49% and in 11 sensitive samples with low stability and low ability to restore functions, the degree of inhibition is the highest with values from 69.39 to 77.02%.


Keywords


Sesamum indicum, genotypes, hydric stress, PEG 6000, optimal concentration, tolerance.

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References


ASHRI, A. Sesame breeding. In: Plant Breeding Reviews, 1998, p.179-228.

KIZIL, S, YOL, E. Influence of salinity and drought stresses on seed germination and seedling growth charac¬te-ristics in sesame (Sesamum indicum L.). In: Mediterranean Agricultural Sciences, 2018, no.31(2), p.155-160. DOI: 10.29136/mediterranean.400265

DOSSA, K., DIOUF, D., WANG, L., WEI, X., ZHANG, Y., NIANG, M., FONCEKA, D., YU, J., MMADI, M.A., YEHOUESSI, L.W., et al. The emerging oilseed crop Sesamum indicum enters the “Omics” era. Front. In: Plant Sci., 2017, p.1154. Doi: 10.3389/fpls.2017.01154

DONGHUA, Li, Komivi Dossa ID, Yanxin Zhang, Xin Wei, Linhai Wang, Yujuan Zhang, Aili Liu, Rong Zhou and Xiurong Zhang. GWAS Uncovers Differential Genetic Bases for Drought and Salt Tolerances in Sesame at the Germination Stage. In: Journal Genes, 2018, p.1-19. Doi:10.3390/genes9020087.

HARFI, M.El., HANINE, H., RIZKI, H., LATRACHE, H. and NABLOUSSI, A. Effect of Drought and Salt Stresses on Germination and Early Seedling Growth of Different Color-seeds of Sesame. Sesamum indicum. In: Int. J. Agric. Biol., 2016, vol.18, no.6, p.1088-1094. ISSN 1560–8530 DOI: 10.17957/IJAB/15.0145

BAHRAMI, H., RAZMJOO, J., JAFARI, A.O. Effect of drought stress on germination and seedling growth of sesame cultivars (Sesamum indicum L.) In: Int. J. Agri. Sci., 2012, p.423–428.

BETRAM, K., JANSSENS, M.J.J., ABDALWAHAB, A. Breeding for drought tolerance in sesame (Sesamum indicum). Proceedings of the Conference on Technological and Institutional Innovations for Sustainable Rural Development. Gottingen, Germany, 2003, p.135.

BOUREIMA, S., OUKARROUM, A., DIOUF, M., CISSÉ, N., VAN DAMME, P. Screening for drought tolerance in mutant germplasm of sesame (Sesamum indicum) probing by chlorophyll a fluorescence. In: Environ. Exp. Bot., 2012, p.37–43. Doi: 10.1016/j.envexpbot.2012.02.015.

VERSLUES, P.E., AGARWAL, M., KATIYAR-AGARWAL, S., ZHU, J., ZHU, J.K. Methods and concepts in quantifying resistance to drought, salt and freezing, abiotic stresses that affect plant water status. In: Plant J., 2006, p.523-539.

BOUREIMA, S., EYLETTERS, M., DIOUF, M., DIOP, T.A., VAN DAMME, P. Sensitivity of Seed Germination and Seedling Radicle Growth to Drought Stress in Sesame (Sesamum indicum L.). In: Research Journal of Environmental Sciences, 2011, p.557-564. DOI: 10.3923/rjes.2011.557.564

ALMANSOURI, M., KINET, J.M., LUTTS, S. Effect of salt and osmotic stresses on germination in durum wheat (Triticum durum Desf.). In: Plant Soil, 2001, p.243-254.

MARAGHNI, M., GORAI, M., NEFFATI, M. Seed germination at different temperatures and water stress levels, and seedling emergence from different depths of Ziziphus lotus. South Afr. J. Bot., 2010, p.453-459.

SALEHPOUR, M., EBADI, A., IZADI, M., JAMAATI-E-SOMARIN, Sh. Evaluation of water stress and nitrogen fertilizer effects on relative water content, membrane stability index, chlorophyll and some other traits of lentils (Lens culinaris L.) under hydroponics conditions. In: J. Environ. Sci., 2009, p.103-109.

КОЖУШКО, Н.И. Оценка засухоустойчивости полевых культур. В сборнике: Диагностика устойчивости растений к стрессовым воздействиям: Методическое руководство. Ленинград: ВАСХНИЛ, с.10-25.


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