Effects of drought during grain filling on PS II activity in rice

Pieters, A. J.; Souki, Susana El

doi:10.1016/j.jplph.2004.11.001

Cited by 67 publications

(44 citation statements)

References 33 publications

(34 reference statements)

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“…However, 30% recovery was obtained in plants rewatered to 25% soil water saturation after forty-eight hours. Drought directly and indirectly impacts photosynthesis, which is one of the primary metabolic processes influencing plant growth and development (Pieters & El Souki, 2005;Praxedes et al, 2006). Miyashita et al (2005) reported similar recovery process to the present study in kidney beans (Phaseolus vulgaris) after forty-eight hours of re-watering in plants grown under drought stress.…”

Section: Resultssupporting

confidence: 83%

Selected physiological responses of roselle (Hibiscus sabdariffa) to drought stress

Evans¹,

Al-Hamdani²

2015

JEBAS

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This greenhouse study was carried out to determine the impact of drought on plant growth, photosynthetic rate and the recovery of photosynthesis after drought relief. Twenty four Roselle plants were equally divided between the control and the treatment groups, which received 100% and 25% soil saturation respectively. The plants were grown under greenhouse conditions with the temperature averaging 27 ± 2ºC. The treatments were applied with seven cycles of watering until the plants reached the anthesis stage. The drought influence caused a significant reduction in the plant height, flower number, and photosynthetic rate. Re-watering the plants growing under drought to 100% water saturation resulted in complete recovery of photosynthetic rate within forty-eight hours. However, rewatering to 25% showed only 30% recovery in photosynthetic rate after forty-eight hours. Photosynthetic pigments including chlorophyll a, b and carotenoid were not significantly influenced by the drought. Similarly, total phenolic compound concentration of the calyx was insignificant between the treatments. However, Anthocyanin concentration of the calyx was significantly higher under the drought treatment.

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Section: Resultssupporting

confidence: 83%

Selected physiological responses of roselle (Hibiscus sabdariffa) to drought stress

Evans¹,

Al-Hamdani²

2015

JEBAS

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“…5 H and I) reflect the higher mesophyll capacity in HRD lines. Although drought stress reduces the efficiency of the PSII reaction center similarly to other studies in rice (27), HRD overexpression maintains higher efficiency of open PSII reactions compared with WT, under both well irrigated and drought conditions, directly indicating the higher photosynthetic efficiency. The amount and activity of photosynthetic machinery per unit leaf area contribute to mesophyll efficiency and influence transpiration efficiency of biomass production (6).…”

Section: Discussionsupporting

confidence: 72%

Improvement of water use efficiency in rice by expression of HARDY , an Arabidopsis drought and salt tolerance gene

Karaba

Dixit

Greco

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

435

251

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Freshwater is a limited and dwindling global resource; therefore, efficient water use is required for food crops that have high water demands, such as rice, or for the production of sustainable energy biomass. We show here that expression of the Arabidopsis HARDY (HRD) gene in rice improves water use efficiency, the ratio of biomass produced to the water used, by enhancing photosynthetic assimilation and reducing transpiration. These drought-tolerant, low-water-consuming rice plants exhibit increased shoot biomass under well irrigated conditions and an adaptive increase in root biomass under drought stress. The HRD gene, an AP2/ERF-like transcription factor, identified by a gain-of-function Arabidopsis mutant hrd-D having roots with enhanced strength, branching, and cortical cells, exhibits drought resistance and salt tolerance, accompanied by an enhancement in the expression of abiotic stress associated genes. HRD overexpression in Arabidopsis produces thicker leaves with more chloroplast-bearing mesophyll cells, and in rice, there is an increase in leaf biomass and bundle sheath cells that probably contributes to the enhanced photosynthesis assimilation and efficiency. The results exemplify application of a gene identified from the model plant Arabidopsis for the improvement of water use efficiency coincident with drought resistance in the crop plant rice.biomass ͉ bundle sheath ͉ photosynthesis ͉ root strength ͉ transcription factor

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“…Lower photosynthetic activity could be a consequence of low photochemical efficiency of PSII, as shown by its lower quantum yield (Pieters and El Souki, 2005). Photochemical quantum yield of PSII is a measure of stress in plants.…”

Section: Introductionmentioning

confidence: 99%

Selenium induced lower respiratory potential in Glycine max (L.) Merr

Mechora¹,

Germ²

2010

Acta Agriculturae Slovenica

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Effect of selenium (Se) was studied in soybean (Glycine max (L.) Merr.) cv. Olna in Ljubljana, Slovenia. Se was added to plants as foliary spraying. Quantum yield of photosystem II (PSII) and respiratory potential measured as ETS activity of mitochondria were measured two times in the growing season. Respiratory potential was higher in young plants compared to mature plants. Se induced the lowering of respiratory potential. Addition of Se had no effect on quantum yield of photosystem II.

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Effects of drought during grain filling on PS II activity in rice

Cited by 67 publications

References 33 publications

Selected physiological responses of roselle (Hibiscus sabdariffa) to drought stress

Selected physiological responses of roselle (Hibiscus sabdariffa) to drought stress

Improvement of water use efficiency in rice by expression of HARDY , an Arabidopsis drought and salt tolerance gene

Selenium induced lower respiratory potential in Glycine max (L.) Merr

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