Photosynthetic characteristics of diploid honeysuckle (Lonicera japonica Thunb.) and its autotetraploid cultivar subjected to elevated ozone exposure

2010 ◽  
Vol 48 (1) ◽  
pp. 87-95 ◽  
Author(s):  
L. Zhang ◽  
H. Xu ◽  
J. C. Yang ◽  
W. D. Li ◽  
G. M. Jiang ◽  
...  
Keyword(s):  
Photosynthetic Characteristics ◽  
Ozone Exposure ◽  
Lonicera Japonica ◽  
Elevated Ozone

Impacts of Elevated Ozone and Ozone protectanton Plant Growth, Nutrients, Biochemical and Yield properties of Turnip (Brassica rapa)

2021 ◽  
Author(s):  
Boomiraj Kovilpillai ◽  
Sethupathi Nedumaran ◽  
Sudhakaran Mani ◽  
Jayabalakrishnan Raja Mani ◽  
Sritharan Natarajan ◽  
...  
Keyword(s):  
Plant Growth ◽  
Block Design ◽  
Ozone Exposure ◽  
Research Station ◽  
Growth Physiology ◽  
Elevated Ozone ◽  
Randomized Block Design ◽  
Size Tuber ◽  
The Impact ◽  
Total Potassium

Abstract An experiment was conducted at woodhouse farm, Horticultural Research Station, Ooty, in the period of October 2017 to March 2018, to quantify the impact of elevated ozone and ozone protectants spray on plant growth, nutrients, biochemical and yield properties of turnip crop in a factorial completely randomized block design replicated thrice. The elevated ozone exposure significantly reduces the plant height, tuber size, tuber weight, Chlorophyll ‘a’, Chlorophyll ‘b’, Total chlorophyll, total nitrogen, total potassium, total Manganese, Iron, Zinc, Copper inturnip. Meanwhile, the elevated ozone exposure significantly increased the total phosphorous, catalase and peroxide activity inturnip. However, ozone protectants played a major role to nullify the tropospheric ozoneeffect on growth, physiology, development and yield of turnip and among them panchagavya performed well followed by neem oil and ascorbicacid.

scholarly journals Learning may help pollinators find their host plants in polluted landscapes

2019 ◽  
Author(s):  
Brynn Cook ◽  
Alexander Haverkamp ◽  
Bill S. Hansson ◽  
T’ai Roulston ◽  
Manuel Lerdau ◽  
...  
Keyword(s):  
Food Production ◽  
Visual Cues ◽  
Host Plants ◽  
Ozone Exposure ◽  
Nicotiana Alata ◽  
Elevated Ozone ◽  
Pollinating Insects ◽  
The Impact ◽  
Plant Pollinator ◽  
Ozone Levels

AbstractPollination strongly contributes to food production, and often relies on pollinating insects. However, atmospheric pollution may interfere with pollination by disrupting floral plumes that pollinators use to navigate to flowers.In this study, we examine the impacts of pollution-induced elevated ozone levels on the composition of a floral blend of Nicotiana alata and examine the response of innate and trained Manduca sexta to the ozone-altered blend.Ozone exposure altered the floral blend of N. alata, and disrupted the innate attraction of naïve M. sexta to the altered blend. However, associative learning can offset this disruption in attraction. Moths that were enticed with visual cues to an artificial flower emitting an ozonated blend learned to associate this blend with a nectar reward after just one rewarded experience. More importantly, moths that were rewarded while experiencing the unozonated floral blend of their host subsequently found the ozonated floral blend of the same host attractive, most likely due to experience-based reinforcement of ozone-insensitive cues in the blend.The attraction of moths to both unaltered and ozonated plumes is critical for tolerating polluted landscapes. At the host plant, where moths feed, floral emissions are relatively pure. As floral odors travel away from the host, however, they become degraded by pollution. Therefore, targeting the flower requires recognizing both conditions of the odor. The ability to generalize between the pure and ozone-altered scents may enable pollinators like M. sexta to maintain communication with their flowers and reduce the impact anthropogenic oxidants may have on plant-pollinator systems.

Effects of chronic elevated ozone exposure on gas exchange responses of adult beech trees (Fagus sylvatica) as related to the within-canopy light gradient

2009 ◽  
Vol 157 (2) ◽  
pp. 537-544 ◽  
Author(s):  
Mitsutoshi Kitao ◽  
Markus Löw ◽  
Christian Heerdt ◽  
Thorsten E.E. Grams ◽  
Karl-Heinz Häberle ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Fagus Sylvatica ◽  
Ozone Exposure ◽  
Elevated Ozone ◽  
Light Gradient

scholarly journals Ambient and Elevated Ozone (O3) impacts on Potato Genotypes (Solanum tuberosum.L) over a high altitude Western Ghats location in Southern India

2016 ◽  
Vol 4 (3) ◽  
pp. 530
Author(s):  
V.S. Suganthy ◽  
C. Udayasoorian
Keyword(s):  
High Altitude ◽  
Western Ghats ◽  
Ozone Exposure ◽  
Growth And Yield ◽  
Tuber Initiation ◽  
Yield Reduction ◽  
Elevated Ozone ◽  
Variation Characteristics ◽  
Initiation Stage ◽  
The Impact

<div><p><em>Globally, next to CO<sub>2</sub> and Methane, raising levels of <strong>tropospheric ozone (O<sub>3</sub>), acts as a secondary pollutant and green house gas </strong>which is a silent threat as well as one of the biggest challenges for the decrease in agricultural production. The diurnal and seasonal variation characteristics of ambient ozone (O<sub>3</sub>) and its precursor NOx was investigated by their continuous measurements at ISRO-Climate Change Observatory situated in a high altitude Western Ghats location of Ooty. The impact of ambient  O<sub>3</sub> on the growth and yield characteristics of various potato genotypes were assessed by the calculated higher ozone exposure indices <strong>AOT40 and SUM60 </strong>than critical levels by showing<strong> “latent injury“ </strong>in the form of  yield reduction (4.56 - 25.5 %) in potato genotypes. The impact of three elevated O<sub>3 </sub>levels (100, 150 and 200 ppb for 4 hd<sup>-1</sup>) on ten potato genotypes was done by fumigation under controlled open–top chamber during its critical stage namely the tuber initiation stage resulted that Kufri Surya proved to be moderately resistant by recording the highest yield.</em></p></div>

Response of pioneer plant communities to elevated ozone exposure

2010 ◽  
Vol 138 (1-2) ◽  
pp. 116-126 ◽  
Author(s):  
Thomas G. Pfleeger ◽  
Milton Plocher ◽  
Puja Bichel
Keyword(s):  
Plant Communities ◽  
Ozone Exposure ◽  
Elevated Ozone ◽  
Pioneer Plant

Ozone effects on nutrient resorption in loblolly pine

1996 ◽  
Vol 26 (9) ◽  
pp. 1634-1642 ◽  
Author(s):  
Timothy R. Baker ◽  
H. Lee Allen
Keyword(s):  
North Carolina ◽  
Loblolly Pine ◽  
Nutrient Resorption ◽  
Ozone Exposure ◽  
Ozone Treatment ◽  
Nutrient Concentrations ◽  
Elevated Ozone ◽  
Before And After ◽  
Per Se ◽  
A Site

A three-year study on the effects of chronic exposure to elevated ozone on loblolly pine (Pinustaeda L.) was conducted at a site in the Piedmont of North Carolina. Open-top chambers were used to control six levels of ozone, from 0.50 times ambient to 3.0 times ambient ozone concentration, on two open-pollinated families with suspected differences in sensitivity to ozone. Nutrient concentrations and contents were measured in fascicles obtained before and after abscission. Ozone strongly accelerated fascicle abscission and also tended to increase most nutrient concentrations in both pre- and post-abscission fascicles. There was, however, no significant impact of the ozone treatment on the amounts of nutrients resorbed during abscission. These data suggest that nutrient resorption associated with elevated ozone exposure followed a pattern more closely approximating accelerated senescence rather than premature abscission per se. The two open-pollinated families did not differ in nutrient resorption but did have isolated differences in the pre- and post-abscission fascicle concentrations.

Assessment of growth, physiological, and yield attributes of wheat cultivar HD 2967 under elevated ozone exposure adopting timely and delayed sowing conditions

2020 ◽  
Vol 27 (14) ◽  
pp. 17205-17220 ◽  
Author(s):  
Annesha Ghosh ◽  
Ashutosh Kumar Pandey ◽  
Madhoolika Agrawal ◽  
Shashi Bhushan Agrawal
Keyword(s):  
Wheat Cultivar ◽  
Ozone Exposure ◽  
Yield Attributes ◽  
Elevated Ozone

scholarly journals Assessment of Physiological, Biochemical and Yield Attributes of Rice Cultivars under Elevated Ozone Stress

2020 ◽  
Vol 107 ◽  
pp. 1-4
Author(s):  
Ramya Ambikapathi ◽  
◽  
Dhevagi Periyasamy ◽  
Maheswari M ◽  
Jayabalakrishnan R.M ◽  
...  
Keyword(s):  
Ozone Exposure ◽  
Growth And Yield ◽  
Yield Traits ◽  
Rice Cultivars ◽  
Yield Attributes ◽  
Elevated Ozone ◽  
Spikelets Per Panicle ◽  
High Ozone Concentration ◽  
Ozone Stress ◽  
1000 Grain Weight

The present study aimed to assess the response of 15 rice cultivars exposed to elevated ozone stress. The plants were exposed to 100 ppb ozone (10:00– 17:00 h) for 30 days at the reproductive stage. Elevated ozone significantly alters the physiological, biochemical, growth and yield traits of all test rice cultivars. Elevated ozone exposure significantly decreased photosynthetic rate maximally in MDU5 (42.90%) and TRY(R)2 showed maximum reduction in stomatal conductance (42.39%) and chlorophyll content (41.22%). In terms of yield traits, a decrease in tiller number, number of effective tillers, number of filled spikelets per panicle and 1000 grain weight over the control were also observed. The multivariate analysis with a total variance of 58.86% categorized the 15 rice cultivars into ozone sensitive (TRY(R) 2, ASD16, ADT(R)45 and MDU5), moderately ozone sensitive (ASD18, ADT43, Rice MDU6, ADT36 and ADT37), moderately ozone tolerant (ADT(R)48 CO47 and Rice CO51) and ozone tolerant (Rice TPS5, Anna(R)4 and PMK(R)3) under 100 ppb ozone. The present results revealed that the ozone tolerant rice cultivars would be recommended to cultivate in the regions experiencing high ozone concentration.

Sign in / Sign up

Export Citation Format

Share Document