Photosynthesis and yield responses of ozone-polluted winter wheat to drought

Xu, He; Biswas, Debabrata; Li, W.-D.; Chen, S.-B.; Zhang, L.; Jiang, Gaoming; Li, Y.-G.

doi:10.1007/s11099-007-0100-7

Cited by 40 publications

(14 citation statements)

References 37 publications

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“…The production of reactive oxygen species (ROS) is the important cause of damage to plants when exposed to environmental stress, which resulted in the growth inhibition, the breakdown of lipid membrane, and oxidative stress [20,23,24]. Liang et al [1] reported that cold damage significantly increased oxidative stress in wheat seedlings, and Liu et al Fig.…”

Section: Discussionmentioning

confidence: 99%

Responses of Wheat Seedlings to Exogenous Selenium Supply Under Cold Stress

Chu

Yao

Zhang

2009

Biol Trace Elem Res

170

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Dose-dependent effects of selenium on growth and physiological trait of wheat seedlings (Triticum aestivum L. cv Han NO.7086) exposed to cold stress are reported. Responses of seedlings were different depending on the Se concentration. The treatments with 0.5 and 1.0 mg Se kg(-1) significantly increased biomass and chlorophyll content of seedlings. However, the treatments at 2.0 and 3.0 mg Se kg(-1) only induced an evident increase in chlorophyll content and did not promote biomass accumulation of seedlings. Antioxidant compounds content (anthocyanins, flavonoids, and phenolic compounds) and antioxidant enzymes' activities (peroxidase and catalase) increased by different Se treatments, while only the treatment with 1.0 mg Se kg(-1) induced a significant reduce in malondialdehyde content and the rate of superoxide radical production of wheat seedlings. The results of this study demonstrated that Se supply could increase antioxidant capacity of seedlings, and optimal Se supply reduced production of free radicals, membrane lipid peroxidation, and promoted biomass accumulation.

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Section: Discussionmentioning

confidence: 99%

Responses of Wheat Seedlings to Exogenous Selenium Supply Under Cold Stress

Chu

Yao

Zhang

2009

Biol Trace Elem Res

170

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“…In contrast, tropospheric O 3 is a health hazard for us. It attacks all plant species and decreases their photosynthesis and growth rates, concomitantly with whitedot symptoms on the leaves of herbaceous species and reddish-to-black-dot symptoms on the leaves of arboreous, leguminous, and gramineous species (Hill and Littlefield 1969, Nouchi 2001, Izuta 2003, Xu et al 2007) and, in the cell, it also damages organelles and biopolymers, including DNA (Roshchina and Roshchina 2003).…”

Section: Introductionmentioning

confidence: 99%

Effects of the interaction between ozone and carbon dioxide on gas exchange, ascorbic acid content, and visible leaf symptoms in rice leaves

Imai¹,

Kobori²

2008

Photosynt.

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Tropospheric ozone (O 3 ) decreases photosynthesis, growth, and yield of crop plants, while elevated carbon dioxide (CO 2 ) has the opposite effect. The net photosynthetic rate (P N ), dark respiration rate (R D ), and ascorbic acid content of rice leaves were examined under combinations of O 3 (0, 0.1, or 0.3 cm 3 m -3 , expressed as O 0 , O 0.1 , O 0.3 , respectively) and CO 2 (400 or 800 cm 3 m -3 , expressed as C 400 or C 800 , respectively). The P N declined immediately after O 3 fumigation, and was larger under O 0.3 than under O 0.1 . When C 800 was combined with the O 3 , P N was unaffected by O 0.1 and there was an approximately 20 % decrease when the rice leaves were exposed to O 0.3 for 3 h. The depression of stomatal conductance (g s ) observed under O 0.1 was accelerated by C 800 , and that under O 0.3 did not change because the decline under O 0.3 was too large. . Excluding the stomatal effect, the mesophyll P N was suppressed only by O 0.3 , but was substantially ameliorated when C 800 was combined. Ozone fumigation boosted the R D value, whereas C 800 suppressed it. An appreciable reduction of ascorbic acid occurred when the leaves were fumigated with O 0.3 , but the reduction was partially ameliorated by C 800 . The degree of visible leaf symptoms coincided with the effect of the interaction between O 3 and CO 2 on P N . The amelioration of O 3 injury by elevated CO 2 was largely attributed to the restriction of O 3 intake by the leaves with stomatal closure, and partly to the maintenance of the scavenge system for reactive oxygen species that entered the leaf mesophyll, as well as the promotion of the P N .

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“…In our previous study, short-term high O 3 exposure (125 mm 3 m -3 , 7 h d -1 for 4 d) to potted winter wheat after anthesis resulted in yield reduction by 21 % (Xu et al 2007). Besides reduced P N in damaged flag leaves, O 3 -treated plants showed premature leaf senescence 5 d earlier than control, which indicated that grain-filling duration was shortened.…”

Section: Discussionmentioning

confidence: 87%

Photosynthetic and yield responses of an old and a modern winter wheat cultivars to short-term ozone exposure

Chen

Biswas

et al. 2009

Photosynt.

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In order to study the responses of winter wheat cultivars released in different years to short-term high O 3 exposure, an old cultivar ('Nongda 311', released in 1960s) and a modern one ('Yannong 19', released in 1990s) were treated with an O 3 exposure (145 ± 12 mm 3 m -3 , 4 h d -1 for 3 d) shortly after anthesis stage (> 50 % main stems blossomed). During the O 3 exposure, light-saturated photosynthetic rate (P N ) and stomatal conductance (g s ) of both cultivars decreased considerably. Elevated O 3 did not decrease dark-adapted maximum photochemical efficiency, but induced significant reduction in actual photochemical efficiency and thereby considerably increase in non-photochemical quenching. P N , g s of the modern cultivar 'Yannong 19' decreased more than the older one 'Nongda 311', indicating the former exhibited higher sensitivity to O 3 than the latter. After O 3 exposure, P N , g s and chlorophyll (Chl) content in flag leaf decreased more quickly than control, indicating induction of faster premature leaf senescence. As a result, the short-term O 3 exposure caused substantial yield loss, with larger reduction in 'Yannong 19' (-19.2 %) than in 'Nongda 311' (-8.4 %). Our results indicated that high O 3 exposure at grain filling stage would have greater negative impacts on the high yielding modern cultivar relative to the old one with lower yield.

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Photosynthesis and yield responses of ozone-polluted winter wheat to drought

Cited by 40 publications

References 37 publications

Responses of Wheat Seedlings to Exogenous Selenium Supply Under Cold Stress

Responses of Wheat Seedlings to Exogenous Selenium Supply Under Cold Stress

Effects of the interaction between ozone and carbon dioxide on gas exchange, ascorbic acid content, and visible leaf symptoms in rice leaves

Photosynthetic and yield responses of an old and a modern winter wheat cultivars to short-term ozone exposure

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