Alternative Respiratory Pathway under Drought is Partially Mediated by Hydrogen Peroxide and Contributes to Antioxidant Protection in Wheat Leaves

Feng, Hongmei; Duan, Jiangong; Li, Hongyu; Huang, Liang; Li, Xin; Han, Na

doi:10.1626/pps.11.59

Cited by 22 publications

(16 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to previous reports, they can easily convert superoxide anion radicals into O -2 and H 2 O 2 , and its activity could also increase by factors such as low temperature, water stress and accumulation of heavy metals (Misra and Gupta, 2006;Chung et al, 2006;Feng et al, 2008). In this study, SOD and POD activities were initially increased and later, they were decreased with the increasing stress time (Figures 4 and 5).…”

Section: Discussionsupporting

confidence: 75%

Effects of low temperature and drought on the physiological and growth changes in oil palm seedlings

Cao¹,

Sun²,

Shao³

et al. 2011

Afr. J. Biotechnol.

View full text Add to dashboard Cite

Water deficiency and low temperature are two important ecological factors which affect the distribution and cultivation of oil palm. To find out how oil palm adapts to the environmental conditions, the dynamics of a series of important physiological components derived from the leaves of potted oil palm seedlings under drought stress (DS) (water with holding) and low temperature stress (LTS) (10°C) were studied. The results showed that low temperature and water stress inhibited the growth of oil palm seedlings. The relative conductivity, injury index, malondialdehyde (MDA) and proline content in the leaves increased to different degrees with the extension of low temperature and drought stress. Superoxide dismutase (SOD) and peroxidase (POD) activities increased and then decreased gradually with the duration of treatment time. The variations of the earlier mentioned parameters except proline content under low temperature stress were greater than that under drought stress. Thus, oil palm possibly showed different response mechanisms under low temperature and drought stress by mediations of these substances, in order to increase plant defense capability. These data provided the information that was utilized to initiate the breeding programme used to improve drought and cold tolerance in oil palm.

show abstract

Section: Discussionsupporting

confidence: 75%

Effects of low temperature and drought on the physiological and growth changes in oil palm seedlings

Cao¹,

Sun²,

Shao³

et al. 2011

Afr. J. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…Then, to assess the balance between the cytochrome and alternative pathways, the cytochrome c pathway was inhibited by 1 mM KCN, whereas the AOX pathway was inhibited by 10 mM salicyldydroxamic acid (SHAM). Residual respiration (v res ) was measured in the presence of both the 1 mM KCN and 10 mM SHAM and the AOX capacity (v aox ) was estimated by the O 2 uptake measured in the presence of 1 mM KCN after discounting v res (vanlerberghe et al, 1998;Feng et al, 2008). Both respiratory inhibitors were supplied for 4 h trough the petiole of detached leaves and maintained at a very low light intensity (PPFDs of around 10-20 mol m -2 s -1…”

Section: Methodsmentioning

confidence: 99%

“…Under several adverse environmental conditions the AOX is up-regulated (Rizhsky et al, 2002;Bartoli et al, 2005;yoshida et al, 2007) and the enhancement of the alternative IN GRAPEvINE (Vitis vinifera L.) Cv. CABERNET SAUvIGNO pathway under drought was previously shown to play a role in limiting the production of ROS (Feng et al 2008). Actually, it is very likely that a special modulation of the alternative pathway may account, at least in part, for the drought tolerance of Vitis vinifera as the AOX seems to be constitutively activated in this species ( ).…”

Section: In Grapevine (Vitis Vinifera L) CV Cabernet Sauvignomentioning

confidence: 99%

Photosynthesis and cell respiration modulated by water deficit in grapevine (Vitis vinifera L.) cv. Cabernet Sauvignon

Martim

Santos²,

Peçanha³

et al. 2009

Braz. J. Plant Physiol.

View full text Add to dashboard Cite

Winegrape productivity and quality has been related to the regulated deficit irrigation, with important implications for the plant bioenergetics. When water deficit is imposed to grapevine plants, alterations in overall photosynthesis and cell respiration are observed. The aim of this study was to assess the modulations promoted by water stress on photosynthesis and respiration in leaves of the cv. Cabernet Sauvignon (cv. CS) for better understanding the physiological responses related to its drought tolerance and quality improvement under water deficit. For this purpose, measurements of photosynthetic efficiency, leaf water potential, gas exchange and O 2 consumption were carried out. Leaf water potential, photosynthesis, stomatal conductance, transpiration and internal carbon concentration were significantly reduced upon stress, suggesting that plants of cv. CS present higher water use efficiency (A N /E) and lower carboxylative capacity (A N /Ci) under this condition. On the other hand, cell respiration increased more than 70 % as estimated by the increase of O 2 consumption measured 12 days after suspension of irrigation. Most of this effect was related to a four-fold increase of the mitochondrial alternative oxidase (AOX) activity. These data indicate a key role for the AOX pathway in the physiological responses of grapevines to water deficit, and it implies that analyses of the AOX activation patterns should be useful for programs aiming to improve the consistency of fruit production and quality of winegrape cultivars by regulated deficit irrigation.Keywords: Vitis vinifera, drought tolerance, irrigation management, respiratory chain regulation, plant bioenergetics.Modulações na fotossíntese e respiração celular relacionadas à deficiência hídrica eM Videira (Vitis Vinifera l.) cV. carbernet sauVignon resumo -A qualidade e produtivade das uvas viníferas têm sido relacionadas a privação regulada de irrigação, o que sugere implicações importantes para a bioenergética da planta. Quando submetidas ao déficit hídrico as videiras apresentam alterações globais na fotossíntese e na respiração. O objetivo deste trabalho foi avaliar as modulações promovidas pelo estresse hídrico na fotossíntese Braz. J. Plant Physiol., 21 (2) e respiração em folhas da cv. Cabernet Sauvignon (cv. CS) visando o melhor entendimento das respostas fisiológicas relacionadas com sua tolerância à seca e melhoria da qualidade sob estresse hídrico. Para tanto, mensurou-se a eficiência fotossintética, o potencial hídrico foliar, as trocas gasosas e o consumo de oxigênio. O potencial hídrico foliar, fotossíntese, condutância estomática, transpiração e concentração interna de carbono foram significativamente reduzidas com o estresse, sugerindo que as plantas da cv. CS apresentam alta eficiência no uso da água (A N /E) e baixa eficiência carboxilativa (A N /Ci) sob essa condição. Por outro lado, a respiração celular estimada pelo consumo de O 2 aumentou mais que 70 % aos doze dias após a suspensão da irrigação, sendo a maior parte desse ef...

show abstract

“…There is less consensus in the literature of how drought impacts respiration rate (Atkin and Macherel, 2009). In some cases, drought was reported to have little or no effect on respiration rate (Ribas-Carbo et al, 2005;Giraud et al, 2008;Gimeno et al, 2010), whereas other studies reported decreases (Haupt-Herting et al, 2001;Haupt-Herting and Fock, 2002;Taylor et al, 2005;Vassileva et al, 2009;Galle et al, 2010;Ayub et al, 2011) or even increases (Bartoli et al, 2005;Feng et al, 2008;Hummel et al, 2010;Begcy et al, 2011). We found that both R D and R L tended to be lower (by about 27%) in moderate drought-stressed than well-watered wild-type N. tabacum (Fig.…”

Section: Knockdown Of Aox Restricts Respiration Rate During Moderate mentioning

confidence: 99%

Mitochondrial Alternative Oxidase Maintains Respiration and Preserves Photosynthetic Capacity during Moderate Drought in Nicotiana tabacum

et al. 2014

View full text Add to dashboard Cite

The mitochondrial electron transport chain includes an alternative oxidase (AOX) that is hypothesized to aid photosynthetic metabolism, perhaps by acting as an additional electron sink for photogenerated reductant or by dampening the generation of reactive oxygen species. Gas exchange, chlorophyll fluorescence, photosystem I (PSI) absorbance, and biochemical and protein analyses were used to compare respiration and photosynthesis of Nicotiana tabacum 'Petit Havana SR1' wild-type plants with that of transgenic AOX knockdown (RNA interference) and overexpression lines, under both well-watered and moderate droughtstressed conditions. During drought, AOX knockdown lines displayed a lower rate of respiration in the light than the wild type, as confirmed by two independent methods. Furthermore, CO 2 and light response curves indicated a nonstomatal limitation of photosynthesis in the knockdowns during drought, relative to the wild type. Also relative to the wild type, the knockdowns under drought maintained PSI and PSII in a more reduced redox state, showed greater regulated nonphotochemical energy quenching by PSII, and displayed a higher relative rate of cyclic electron transport around PSI. The origin of these differences may lie in the chloroplast ATP synthase amount, which declined dramatically in the knockdowns in response to drought. None of these effects were seen in plants overexpressing AOX. The results show that AOX is necessary to maintain mitochondrial respiration during moderate drought. In its absence, respiration rate slows and the lack of this electron sink feeds back on the photosynthetic apparatus, resulting in a loss of chloroplast ATP synthase that then limits photosynthetic capacity.

show abstract

Alternative Respiratory Pathway under Drought is Partially Mediated by Hydrogen Peroxide and Contributes to Antioxidant Protection in Wheat Leaves

Cited by 22 publications

References 43 publications

Effects of low temperature and drought on the physiological and growth changes in oil palm seedlings

Effects of low temperature and drought on the physiological and growth changes in oil palm seedlings

Photosynthesis and cell respiration modulated by water deficit in grapevine (Vitis vinifera L.) cv. Cabernet Sauvignon

Mitochondrial Alternative Oxidase Maintains Respiration and Preserves Photosynthetic Capacity during Moderate Drought in Nicotiana tabacum

Contact Info

Product

Resources

About