Effects of foliar application of nitrogen on the photosynthetic performance and growth of two fescue cultivars under heat stress

Zhao, Wenhui; Xu, Sheng; Li, J. L.; Cui, Langjun; Chen, Y. N.; Wang, J. Z.

doi:10.1007/s10535-008-0021-8

Cited by 27 publications

(36 citation statements)

References 26 publications

(19 reference statements)

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“…Fu and Huang (2003) reported that additional foliar application of ammonium nitrate improved TQ and alleviated heat injury. This is consistent with our findings of TQ at d 28, with better TQ under high N compared to that under low N. Photosystem II is known to be sensitive to heat stress (Critchley and Chopra, 1988), with Fv/Fm decline being reported repeatedly in various plants under heat stress Zhao et al, 2008). Fv/Fm under high N at d 15 and d 28 were 17% and 15% higher than that under low N, respectively.…”

Section: Discussionsupporting

confidence: 91%

“…Similar results were found in two tall fescue (Festuca arundinacea Schreb.) cultivars under heat stress (Zhao et al, 2008) , superoxide dismutase (SOD) activity in roots (C) and shoots (D) of heat stressed creeping bentgrass as affected by two nitrogen levels (low and high, average across 3 CK rates). D0: the day before heat stress was initiated; D28: 28 days after heat stress; *Significantly different at P < 0.05.…”

Section: Discussionmentioning

confidence: 99%

“…A more recent study reported that higher N helped to maintain higher photosynthetic N-use efficiency and photosynthesis in maize (Zea mays L.) under heat stress . In heat stressed cool-season turfgrasses, additional foliar N supply was found to be beneficial (Fu and Huang, 2003;Zhao et al, 2008). Maintenance of the scavenging ability of antioxidants and inhibition of lipid peroxidation by foliar application of NH 4 NO 3 is thought to be related to improved heat tolerance (Fu and Huang, 2003).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Antioxidative responses in roots and shoots of creeping bentgrass under high temperature: Effects of nitrogen and cytokinin

Wang

Zhang

Ervin

2012

Journal of Plant Physiology

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Antioxidative responses in roots and shoots of creeping bentgrass under high temperature: Effects of nitrogen and cytokinin

Wang

Zhang

Ervin

2012

Journal of Plant Physiology

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“…6). Our values of stomatal conductance for fescue were within previously observed laboratory values, although lower than well-watered fescue under laboratory conditions (~400 mmol/m 2 /s) (Zhao et al 2008;Swarthout et al 2009). Stomatal conductance of native sedge was within the observed range for Carex species grown in drained soils (Busch and Lösch 1998).…”

Section: Discussionsupporting

confidence: 87%

A comparative study of the water budgets of lawns under three management scenarios

Bijoor

Pataki

Haver³

et al. 2014

Urban Ecosyst

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The fate of irrigation in urban ecosystems is highly uncertain, due to uncertainties in urban ecohydrology. We compared irrigation rates, soil moisture, evapotranspiration (ET), stomatal conductance, and water budgets of landscape ecosystems managed with different turfgrass species and irrigation technologies. The "Typical" landscape had a cool-season fescue and was irrigated by an automatic timer. The "Alternative1" landscape had a warmseason paspalum and a "smart" soil moisture sensor-based irrigation system. The "Alternative2" landscape had a cool-season native sedge and a "smart" weather station-based drip irrigation system. ET was measured with a portable closed chamber and modeled using a Penman-Monteith approach, and the two methods agreed well. The water applied to the Alternative1 was 54 % less than the water applied to the Typical landscape, and the water applied to the Alternative2 was 24 % less. Soil moisture was similar in the Typical and Alternative2, while Alternative1 was drier in spring. The stomatal conductance of sedge was lower than the other two species, but its ET was not lower due to higher leaf area. Irrigation efficiencies (ET/applied irrigation) were 57 -58 %, 86 -97 %, and 78 -80 % for the Typical, Alternative1, and Alternative2 landscapes, respectively. Runoff was less than 2 % in each landscape, and excess irrigation primarily drained below the root zone. Differences in irrigation efficiency between landscapes were due mainly to irrigation application, which varied more than species water use. Smart irrigation systems provided substantial water savings relative to a timer-based system, and prevented significant drainage losses. The utilization of smart sensors was more important than the choice of turfgrass species for irrigation efficiency.

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“…Drought and heat stresses often occur simultaneously (Wollenweber et al 2003, Griffin et al 2004) and can induce cellular damage due to accumulation of ROS (Ali et al 2005, Lei et al 2006, Bhattacharjee 2008, Wang et al 2009). They also increase certain avoidance mechanisms such as photorespiration, xanthophyll-mediated thermal dissipation, and AOX to alleviate ROS production (Noctor et al 2002, Zhou et al 2007, Bartoli et al 2005, Zhao et al 2008. Moreover, they increase the activities of antioxidant enzymes.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

Photosynthesis, respiration and antioxidant enzymes in pepper leaves under drought and heat stresses

Hu¹,

Xiao²,

ZENG³

et al. 2010

Biologia plant.

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Leaf gas exchange, chlorophyll fluorescence and activities of antioxidant enzymes were studied in two pepper (Capsicum annuum L.) cultivars grown under drought (D) and heat (H), as well as under drought and heat in combination (HD). The drought-tolerant cv. Zhengjiao 13 exhibited greater net photosynthetic rate (P N ) and cytochrome respiratory pathway activity (R SHAM ), and lower contents of superoxide radical and hydrogen peroxide, as compared to the drought-sensitive cv. Longkouzaojiao. The P N and R SHAM decreased and ROS production increased under D and HD in both cultivars. As compared to the Longkouzaojiao, Zhengjiao 13 retained higher non-photochemical quenching (NPQ), photorespiration rate (R L ), and alternative respiratory pathways (R KCN ) under D and HD. Drought increased the superoxide dismutase (SOD) and ascorbate peroxidase (APX) activities in the cytosol, chloroplasts and mitochondria in the two cultivars. Although SOD and APX activities decreased in Longkouzaojiao under HD, SOD activity increased in Zhengjiao 13. There was no H-induced reactive oxygen species production due to increase of R L , NPQ, R SHAM , R KCN and activities of SOD and APX. However, H slightly decreased the P N . The results indicated that HD was more detrimental than either stress alone.Additional key words: alternative oxidase, ascorbate peroxidase, Capsicum annuum, chlorophyll fluorescence, drought tolerance, net photosynthetic rate, photorespiration rate, superoxide dismutase.

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Effects of foliar application of nitrogen on the photosynthetic performance and growth of two fescue cultivars under heat stress

Cited by 27 publications

References 26 publications

Antioxidative responses in roots and shoots of creeping bentgrass under high temperature: Effects of nitrogen and cytokinin

Antioxidative responses in roots and shoots of creeping bentgrass under high temperature: Effects of nitrogen and cytokinin

A comparative study of the water budgets of lawns under three management scenarios

Photosynthesis, respiration and antioxidant enzymes in pepper leaves under drought and heat stresses

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