Impact of chronic elevated ozone exposure on photosynthetic traits and anti-oxidative defense responses of Leucaena leucocephala (Lam.) de wit tree under field conditions

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.

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Impact of elevated ozone concentration on yield of four Chinese rice cultivars under fully open-air field conditions

Agriculture Ecosystems & Environment ◽

10.1016/j.agee.2009.01.009 ◽

2009 ◽

Vol 131 (3-4) ◽

pp. 178-184 ◽

Cited By ~ 85

Author(s):

Guangyao Shi ◽

Lianxin Yang ◽

Yunxia Wang ◽

Kazuhiko Kobayashi ◽

Jianguo Zhu ◽

...

Keyword(s):

Ozone Concentration ◽

Field Conditions ◽

Rice Cultivars ◽

Elevated Ozone

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Interactive effects of elevated ozone and springtime frost on growth and physiology of birch (Betula pendula) in field conditions

Trees ◽

10.1007/s00468-007-0184-5 ◽

2007 ◽

Vol 22 (3) ◽

pp. 291-301 ◽

Cited By ~ 4

Author(s):

Tarja Silfver ◽

Elina Häikiö ◽

Matti Rousi ◽

Toini Holopainen ◽

Elina Oksanen

Keyword(s):

Betula Pendula ◽

Field Conditions ◽

Interactive Effects ◽

Elevated Ozone

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Ozone exposure and flux-based response functions for photosynthetic traits in wheat, maize and poplar

Environmental Pollution ◽

10.1016/j.envpol.2015.07.046 ◽

2015 ◽

Vol 206 ◽

pp. 411-420 ◽

Cited By ~ 24

Author(s):

Matthieu Bagard ◽

Yves Jolivet ◽

Marie-Paule Hasenfratz-Sauder ◽

Joëlle Gérard ◽

Pierre Dizengremel ◽

...

Keyword(s):

Ozone Exposure ◽

Response Functions ◽

Photosynthetic Traits

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Learning may help pollinators find their host plants in polluted landscapes

10.1101/649251 ◽

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.

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