An optical interferometric technique for assessing ozone induced damage and recovery under cumulative exposures for a Japanese rice cultivar

Bodhipaksha Lalith Sanjaya Thilakarathne, Rajagopalan Umamaheswari, Hirofumi Kadono, Tetsushi Yonekura

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Exposure to ozone (O3) causes reduction both in the growth and yield of rice (Oriza sativa L.). Commonly used Chlorophyll fluorescent measurements are not sensitive enough for short term exposure of O3 aiming an immediate assessments. Such a conventional method typically needs exposure over a few days to detect the influence. As an alternative method, we proposed a novel non-invasive, robust, real-time, optical Statistical Interferometric Technique (SIT) to measure growth at an accuracy of 0.1 nm with a commonly consumed Japanese rice cultivar, Koshihikari. In the present study, we have conducted a repetitive O3 exposure experiment for three days under three different concentrations of 0 nl l-1 (control), 120 nl l-1, and 240 nl l-1, to investigate the damage and recovery strengths. As a measure to assess the effect and recovery from three consecutive day exposures of O3, we measured the elongation rate (nm mm-1 sec-1) every 5.5 sec for 7 hours, and it revealed nanometric elongation rate fluctuations or Nanometric Intrinsic Fluctuations (NIF). Comparing the standard deviation (SD) of normalized nanometric intrinsic fluctuations (NNIF), which was normalized by that before the exposure, we found that drastic reductions under both 120 nl l-1 and 240 nl l-1 O3 concentrations. Reduction percentages were large under high O3 concentration of 240 nl l-1 indicating the possibility of irreversible effect. However exposure to 120 nl l-1 of O3 showed recovery on the 2nd and 3rd days. While SIT did reveal immediate effect based on an observation for a few hours, the visible foliar effect could be observed only after a week. Hence, the technique could provide a way for fast assessment of effect and recovery due to cumulative exposure of O3 and hence the tolerance as well as the vitality of plant.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalSpringerPlus
Volume3
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

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cultivar
rice
ozone
damage
exposure
chlorophyll
tolerance
effect
experiment

Keywords

  • Atmospheric pollution
  • Chlorophyll fluorescence
  • Crop
  • Environmental effects
  • Growth
  • Instantaneous growth
  • Optical interferometric technique
  • Ozone
  • Plant growth measurement
  • Rice (Oriza sativa L.)
  • Yield

ASJC Scopus subject areas

  • General

Cite this

An optical interferometric technique for assessing ozone induced damage and recovery under cumulative exposures for a Japanese rice cultivar. / Thilakarathne, Bodhipaksha Lalith Sanjaya; Umamaheswari, Rajagopalan; Kadono, Hirofumi; Yonekura, Tetsushi.

In: SpringerPlus, Vol. 3, No. 1, 01.01.2014, p. 1-12.

Research output: Contribution to journalArticle

Thilakarathne, Bodhipaksha Lalith Sanjaya ; Umamaheswari, Rajagopalan ; Kadono, Hirofumi ; Yonekura, Tetsushi. / An optical interferometric technique for assessing ozone induced damage and recovery under cumulative exposures for a Japanese rice cultivar. In: SpringerPlus. 2014 ; Vol. 3, No. 1. pp. 1-12.
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