International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (499) Last page : (510)
Article doi: http://dx.doi.org/10.18782/2320-7051.5365
Studies on the Histological and Biochemical Basis of Rice Culm for Lodging Tolerance in Rice (Oryza sativa L.)
Anand Rao1* N., Sreekanth2 B., Sheshu Madhav3 M. and Narendar Reddy4 S.
1,2,4Department of crop physiology, Professor Jayashankar Telangana State Agricultural University
(PJTSAU), Rajendranagar, Hyderabad
3Department of Biotechnology, Indian Institute of Rice research (IIRR), Rajendranagar, Hyderabad
*Corresponding Author E-mail: anandraoagri@gmail.com
Received: 31.07.2017 | Revised: 9.08.2017 | Accepted: 10.08.2017
ABSTRACT
An experiment was conducted to find out “studies on the histological and biochemical basis of rice culm for lodging tolerance at reproductive phase in rice (Oryza sativa.L) by studying relevant parameters in three different groups of rice germplasm viz., stable strong culm mutant lines (SP-351, SP-353, SP-360 and SP-70) ; lodging tolerant varieties (MTU-1112, MTU-1121, MTU-1166 and MTU-1001) and lodging susceptible varieties (Swarna, BPT-5204, Tellahamsa and RNR-15048) . Histological studies revealed that in rice physical strength of the culm was highly correlated to the number of vascular bundles of cross sectional area of the basal culm (3rd internode) as well as the thickness of dermal sclerenchyma. It should be noted that pattern of distribution of vascular bundles didn’t differ in the varieties / lines under the present study. Therefore, if time and facilities permits, these two histological parameters should be considered while measuring lodging nature of rice culms. Biochemical analysis showed that mineral components are strongly correlated to the physical strength of rice culms in other words, lodging nature. It should be noted that N and Si content of culms decreased between 50% flowering and full ripening stages of rice, while K increased. At 50% flowering stage, N content of culms significantly correlated to physical strength of culms, while at full ripening stage showed non-significant correlation. However, K and Si contents of culms showed highly significant correlation with physical strength of culms i.e., lodging tolerance.
Key words: Thickness of Epi Hypo Dermal Sclerenchyma, Number of Vascular Bundles, Total Content of N, P and K.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Rao, A.N., Sreekanth, B., Madhav, S.M. and Reddy, N.S., Studies on the Histological and Biochemical Basis of Rice Culm for Lodging Tolerance in Rice (Oryza sativa L.), Int. J. Pure App. Biosci.5(4): 499-510 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5365
