Effect of irrigation intervals on some morphophysiological traits of sesame (Sesamum indicum L.) ecotypes

بوم شناسی کشاورزی

Article 8, Volume 2, Issue 4 - Serial Number 6, December 2010, Pages 658-666   

Document Type: Scientific - Research

DOI: 10.22067/jag.v2i4.8804

Author

Morteza Goldani^*

Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

In order to evaluate the effect of different irrigation intervals on some morphophysiological traits of sesame (Sesamum indicum L.), an experiment was conducted under greenhouse conditions during 2009. The experiment was based on a randomized completely design with three replications. Treatments included four irrigation intervals with 4, 8, 12 and16 days intervals and two ecotypes of sesame (Kalat and Se-ghaleh). The results showed that there were significant differences in plant height, node number, internodes length, capsule number, capsule weight and shoot dry weight between irrigation intervals. With increasing irrigation intervals, the mentioned traits decreased. Se-ghaleh was more drought tolerant than Kalate ecotype. Interaction between irrigation intervals and ecotypes showed that, the best treatment related to four days irrigation interval and Se- ghaleh ecotype. The effect of irrigation intervals on surface area, diameter, total length, volume and dry weight of root was significant. In all irrigation intervals, Se-ghaleh showed better performance. The results showed that increased irrigation interval caused a decreasing in root surface area, but increasing in total root length. With increasing irrigation interval, transpiration and photosynthesis rates significantly decreased. It was concluded that increasing irrigation interval up to 12 days decreased shoot and root surface areas. The Se-ghaleh ecotype was more drought tolerance than Kalat.

Keywords

Drought tolerance; Photosynthesis rate; Root; Shoot; Transpiration rate

References

1- Blum, A. 2005. Drought resistance, water-use efficiency, and yield potential-are they compatible, dissonant, or mutually exclusive? Australian Journal of Agriculture 56: 1159-1168.

2- Emam, Y., and Zavarehi, M. 2005. Drought tolerance in higher (Genetically, Physiological and Molecular Biological Analysis). Academic Publishing Center of Tehran. (In Persian)

3- Golestani, M., and Pakniat, H. 2008. Evaluation of tolerance to drought characters in the Sesamum lines. Sciences and Technologies of Agriculture and Natural Resources 41: 141-149.

4- Goyal, V., Sudha, J., and Bishnoi, N., 1998. Effect of terminal water stress on stomatal resistance, transpiration, and canopy temperature and millet yield. Annual Agriculture Biology Research 3: 119-122.

5- Gregory, P.J. 2006. Plant Roots (Growth, Activity and Interaction with Soils), Blackwell Publishing pp: 150-173.

6- http://www.uidaho.edu/extension/drought/Sentinel26.

7- John, T., Christopher, A.M., Borrel, A.M., Manschadi, G., Hammer, G., and Chapman, S. 2004. Developing high yielding wheat for water limited environments in northern Australia. Proceedings of the 4th International Crop Science Congress Brisbane, Australia, 26 Sep – 1 Oct.

8- Kafi, M., and Damghani, A. 2000. Mechanism of environmental stress resistance in plants. Ferdowi University of Mashhad Publication. (In Persian).

9- Kafi, M., Lahootee, M., Zand, E., Shareefee, H.R., and Goldani, M. 2000. Plant Physiology. Jahadeh Daneshgahi Press. PP. 355-340. (In Persian)

10- Keshavarse, M., Ashrafi, A., and Razmjo, K.H. 2009. Effect of NaCl salt on seed germination of 7 Sesamum cultivars. The First National Conference on Science and Technology Iran’s Seed.

11- Kobata, T., Palta, J.A., and Turner, N.C. 1992. Rate of development of postanthesis water deficits and grain filling of spring wheat. Crop Sciense 32: 1238-1242.

12- Krenzer, E.G., Nipp, T. L., and Mcnew, R.W. 1991. Winter wheat main stem leaf appearance and tiller formation vs. moisture treatment. Agronomy Journal 83: 663-667.

13- Lafond, G.P., and Fowler, D.B. 1989. Soil temperature and moisture stress effects on kernel water uptake and germination of winter wheat. Agronomy Journal 81: 447-450.

14- Mundree, S.G., and Baker, B. 2002. Physiological and molecular insights in to drought tolerance. African Journal of Biotechnology 1: 28-38.

15- Sepaskhah, A.R. and Andam, M. 2001. Crop coefficient of sesame in a semi arid region of Iran. Agriculture Water Management 49: 51-63.

16- Sharp, R.E., and Lenoble, M.E. 2002. ABA, ethylene and the control of shoot and root growth under water stress. Journal of Experimental Botany 53: 33-37.

17- Siddique, M.R.B., Hamid, A., and Islam, M.S. 2000. Drought stress effects on water relations of wheat. Botanical Bulletin Academia Sinica 41: 35-39.

18- Simane, B.P., Struik, C., Nachit, M.M., and Peacock, J.M. 1993. Ontogenic analysis of yield components and yield stability of durum wheat in water-limited environments. Euphytica 71: 211-219.

19- Statistics. 2001. Agricultural statistic, funding and planting rice minister in Agricultural, Bulletin 1: 185.

20- University of Idaho Cooperative extension system. 2001. Growth stage stress tolerant. The Cereal Sentinel.

21- Van Oosterrom, E.J., and Acevedo, E. 1993. Leaf area and crop growth in relation to phenology of barley in Mediterranean environments. Plant and Soil 148: 223-237.

22- Wolf, D.W., Gifford, R.M., Hilbert, D., and Luos, Y. 1998. Integration of photosynthetic acclimation to CO2 at the whole-plant level. Global Change Biology 4: 879-893.