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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2017)
[Effective from January 1, 2017]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(11): 3632-3639
DOI: https://doi.org/10.20546/ijcmas.2018.711.417


Source and Sink Activity during Reproductive Phase of Rice (Oryza sativa L.)
P. Venkata Narayana1*, B. Sreekanth1, Y. Ashoka Rani1 and B. Krishnaveni2
1Department of Crop Physiology, ANGRAU, Bapatla, India
2Department of Genetics and Plant Breeding, ARS, Bapatla., India
*Corresponding author
Abstract:

Source and sink activity measured after anthesis in six poplar rice cultivars. The experiment was laid in randomized block design with six cultivars MTU-1001, MTU-1010, MTU-7029, BPT-2231, BPT-3291 and BPT-5204 replicated four times. After anthesis, top three leaves separately, top three internodes collectively, panicle axis and grain of main culm were sampled at seven day interval and analysed for biochemical parameters that serve remobilization of nutrients. During the initial and later halves of the sampling, there was a shift in higher amylase activity from third to flag leaves. Protease activity of leaves showed an increase in all the three leaves with age, with higher levels in flag leaves and lowest levels in third leaves. Amylase activity of the top three internodes increased till 14 DAA in MTU-1010, MTU-7029 and BPT-3291, while the increase continued till 21 DAA in MTU-1001, BPT-3291 and BPT- 5204, which later decreased in either case. Similar change in total carbohydrate contents were found in the top three internodes of main culm, which increased to a higher value and decreased later, with the exception of MTU-1010 in which increase in total carbohydrates was till 21 DAA. There were varietal differences in the total carbohydrate contents and amylase enzyme activities of panicle axis, during the sampling period. Total carbohydrate contents of panicle axis increased till 21 DAA, which later decreased. But, the amylase activity of panicle axis increased till either 14 DAA (MTU-1001, MTU-7029, BPT-2231 and BPT-3291) or 21 DAA (MTU-1010 and BPT-5204), which later decreased. Total carbohydrates and proteins of grains increased with maturity, which differed among varieties. Extent of increase in total carbohydrates of grain was higher in BPT-5204, while total proteins of grain increased to greater extent in BPT-3291.


Keywords: Rice, Remobilization, Amylase, Total Carbohydrates, proteases, Proteins.
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How to cite this article:

Venkata Narayana, P., B. Sreekanth, Y. Ashoka Rani and Krishnaveni, B. 2018. Source and Sink Activity during Reproductive Phase of Rice (Oryza sativa L.).Int.J.Curr.Microbiol.App.Sci. 7(11): 3632-3639. doi: https://doi.org/10.20546/ijcmas.2018.711.417