Carbon isotope discrimination and yield of upland rice as affected by drought at flowering

Pinheiro, B. da S.; Austin, R. B.; Carmo, Maria Pereira Do; Hall, Michael A

doi:10.1590/s0100-204x2000001000004

Cited by 9 publications

(5 citation statements)

References 19 publications

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“…When drought occurred in the mid-season (e.g., between the jointing stage and anthesis), its effect on wheat head size (i.e., the number of spikelet per spike) might be irreversible since late-emerging tillers would not contribute to yield [ 36 ]. It is more critical when drought occurred during the flowering and grain-filling stages than other stages and resulted in substantial yield reduction due to reduced rates of net photosynthesis owing to metabolic limitations (e.g., oxidative damage to chloroplasts and stomatal closure) and poor grain set and development [ 9 , 37 ]. The results show that post anthesis mild drought decreased wheat yields by 1–30% while a prolonged mild drought during the flowering and grain filling stages reduced grain yields by 58–92% [ 9 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis

Zhang

Cheng

et al. 2018

IJERPH

243

152

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Drought has been one of the most important limiting factors for crop production, which deleteriously affects food security worldwide. The main objective of the present study was to quantitatively assess the effect of drought on the agronomic traits (e.g., plant height, biomass, yield, and yield components) of rice and wheat in combination with several moderators (e.g., drought stress intensity, rooting environment, and growth stage) using a meta-analysis study. The database was created from 55 published studies on rice and 60 published studies on wheat. The results demonstrated that drought decreased the agronomic traits differently between rice and wheat among varying growth stages. Wheat and rice yields decreased by 27.5% and 25.4%, respectively. Wheat grown in pots showed greater decreases in agronomic traits than those grown in the field. Rice showed opposite growing patterns when compared to wheat in rooting environments. The effect of drought on rice increased with plant growth and drought had larger detrimental influences during the reproductive phase (e.g., blooming stage, filling stage, and maturity). However, an exception was found in wheat, which had similar decreased performance during the complete growth cycle. Based on these results, future droughts could produce lower yields of rice and wheat when compared to the current drought.

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Section: Discussionmentioning

confidence: 99%

Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis

Zhang

Cheng

et al. 2018

IJERPH

243

152

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“…This causes a delay in flowering by around two to three weeks and a decrease in spikelet fertility, grain number, and grain yield (Fisher & Fukai, 2003). Water deficit during anthesis or cell division causes pollination abnormality, desiccation of spikelet, inhibition of anthesis (Pinheiro et al, 2000), and an increase in the spikelet sterility (Boonjung & Fukai, 1996). Possession of a deep root system with high root length density may be an essential feature during intermittent drought stress if the germinating conditions favor the root development at depth (Kamoshita et al, 2008) and drought frequently reduces yield.…”

Section: Types Of Droughtmentioning

confidence: 99%

Drought Impacts and the Tolerance Mechanisms in Rice (Oryza sativa L.): A Review

Oyebamiji

Shamsudin²,

Ikmal³

et al. 2022

Egypt. J. Agron.

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Egyptian Journal of Agronomy http://agro.journals.ekb.eg/ Review 9 R ICE (Oryza sativa L.) is considered the major source of calories for more than half of the world's population. However, this Asian staple crop is susceptible to abiotic stress, including drought, throughout its life cycle. The main theme covered in this review includes types of drought and its effects on rice morphological, physiological, biochemical, and agronomical levels and their adaptive mechanisms under drought. Drought in the rainfed ecosystem during critical stages (germination and reproductive stages) has seriously undermined rice production, posing a danger to global food supply and sustainable food production worldwide. It caused a reduction in the germination rate, CO 2 assimilation rate, photosynthesis activities, gas exchange via the leaf, plant height, number of panicles, seed weight, biomass, harvest index, and yield. Delayed seed germination, flowering, and maturity of the rice plant are also associated with water stress. Under mild or adverse drought conditions, plants exhibit certain adaptive changes or tolerance mechanisms, including activating antioxidant systems and the production of osmolytes such as proline and polyamine, subsequently enhancing drought tolerance. The role of phytohormones in alleviating stress has been recognized and highlighted in this review. Furthermore, the plant root system also plays a significant role in drought. The information provided in this review will help researchers to have comprehensive knowledge and understanding of the changes and disruptions that occur in rice during water stress and its tolerance mechanisms, subsequently facilitating the selection and development of droughttolerant rice.

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“…Along with the inhibition of anthesis, which leads to high sterility of spikelets. Spikelet fertility is the component that has the highest correlation with grain yield, under water deficit conditions in the reproductive phase (Pinheiro et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Water Deficit and Excess and the Main Physiological Disorders in Agricultural Crops

Villa¹,

Petry²,

Santos³

et al. 2022

JAS

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The comprehension of the precise water consumption of agricultural crops is a valuable tool for establishing management programs and irrigation schedules. Appropriately, the purpose of this study was to promote a bibliographic review on the main reflexes of the inappropriate use of water and what this process can promote in the establishment and development of agricultural crops. Moreover, theoretical questions were raised regarding physiological responses triggered by soil water deficit and its effect on crop growth, critical periods for water deficit, physiological responses, and their effects on the growth of main agricultural crops. Information on the misuse of water resources and its effects have presented a series of manifestations to plants and, consequently, to agricultural production, such as a production depletion, reduction of carbon fixation, nutritional deficiency, reduction of plant height, reduction of thousand-grain weight, yellowing of leaves, reduction in germination percentage, among other factors. Correspondingly, water stress can cause a drastic reduction in leaf area, productivity decrease, stomatal closure, leaf senescence, reduced roots, reduced flowering, hampering crop emergence and stability, spikelet sterility, etc. Finally, studies aimed at the consequences of poor irrigation and/or inadequate precipitation values are of high importance, mainly due to the investigative improvement on the use of water in an effective and sustainable way.

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Carbon isotope discrimination and yield of upland rice as affected by drought at flowering

Cited by 9 publications

References 19 publications

Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis

Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis

Drought Impacts and the Tolerance Mechanisms in Rice (Oryza sativa L.): A Review

Water Deficit and Excess and the Main Physiological Disorders in Agricultural Crops

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