Drought-stress responses of two lowland rice cultivars to soil water status

Wopereis, M.C.S.; Kropff, M.J.; Maligaya, A.R.; Tuong, To Phuc

doi:10.1016/0378-4290(95)00084-4

Cited by 167 publications

(89 citation statements)

References 17 publications

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“…S9) (Riboni et al, 2013). In contrast, lowland rice is historically grown in mesic conditions and tends to delay flowering in response to temporary drought stress (Wopereis et al, 1996;Ndjiondjop et al, 2010). Therefore, the two model plants (Arabidopsis and rice) seem to display opposite flowering time responses to drought stress.…”

Section: Discussion Drought Inhibition Of Flowering a Rice Unique Drmentioning

confidence: 99%

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A Drought-Inducible Transcription Factor Delays Reproductive Timing in Rice

Zhang

Zhao

et al. 2016

Plant Physiol.

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The molecular mechanisms underlying photoperiod or temperature control of flowering time have been recently elucidated, but how plants regulate flowering time in response to other external factors, such as water availability, remains poorly understood. Using a large-scale Hybrid Transcription Factor approach, we identified a bZIP transcriptional factor, O. sativa ABA responsive element binding factor 1 (OsABF1), which acts as a suppressor of floral transition in a photoperiod-independent manner. Simultaneous knockdown of both OsABF1 and its closest homologous gene, OsbZIP40, in rice (Oryza sativa) by RNA interference results in a significantly earlier flowering phenotype. Molecular and genetic analyses demonstrate that a drought regime enhances expression of the OsABF1 gene, which indirectly suppresses expression of the Early heading date 1 (Ehd1) gene that encodes a key activator of rice flowering. Furthermore, we identified a drought-inducible gene named OsWRKY104 that is under the direct regulation of OsABF1. Overexpression of OsWRKY104 can suppress Ehd1 expression and confers a later flowering phenotype in rice. Together, these findings reveal a novel pathway by which rice modulates heading date in response to the change of ambient water availability.Flowering time (or heading date) and drought resistance are two major yield traits in crops, especially rice (Oryza sativa). As global climatic change looms, drought has become the biggest abiotic stress to limit crop yields. Breeders have capitalized on naturally occurring genetic variations to improve or maintain crop yield in times or areas of drought by different strategies (Eisenstein, 2013). Manipulation of floral transition has been a promising way to maximize crop yield during dry periods. This strategy has been successful due to extensive identification of genetic loci and elucidation of molecular mechanisms that control flowering time under diverse or unpredictable environments.Heading date in rice is influenced by many environmental cues such as day length (photoperiod), temperature, nutrition, and water availability. Molecular mechanisms that underlie photoperiod regulation of flowering time have already been characterized, probably because day length is more predictable than other environmental factors during seasonal changes. Rice is a facultative short-day plant that flowers earlier in short days (SDs) than in long days (LDs). Heading date 3a (Hd3a) and RICE FLOWERING LOCUS T1 (RFT1) are two paralogous genes in rice encoding "florigen" molecules expressed in the phloem of leaves and transported to the shoot apical meristem to promote flowering (Tamaki et al., 2007;

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Section: Discussion Drought Inhibition Of Flowering a Rice Unique Drmentioning

confidence: 99%

“…The biological networks connecting drought perception, ABA signaling, and flowering gene regulation also remain unclear. In contrast to Arabidopsis species, rice cultivars tend to delay flowering in response to drought treatment (Wopereis et al, 1996;Ndjiondjop et al, 2010), but the underlying mechanism is less characterized.…”

mentioning

confidence: 99%

A Drought-Inducible Transcription Factor Delays Reproductive Timing in Rice

Zhang

Zhao

et al. 2016

Plant Physiol.

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“…The shift from flooded to aerobic soil conditions causes changes in soil water status, soil aeration and nutrient availability (Timsina and Connor 2001). Generally, rice plants are very sensitive to water stress when exceeding critical levels of soil water deficits; it was reported that leaf expansion in lowland rice stops completely with root-zone soil water pressure potential exceeding 50 kPa (Wopereis et al 1996). Scientific findings on the physiological responses to various levels of water stress in aerobic rice are lacking.…”

Section: Introductionmentioning

confidence: 99%

Crop response of aerobic rice and winter wheat to nitrogen, phosphorus and potassium in a double cropping system

Dai

Zhang

Spiertz

et al. 2009

Nutr Cycl Agroecosyst

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In the aerobic rice system, adapted rice cultivars are grown in non-flooded moist soil. Aerobic rice may be suitable for double cropping with winter wheat in the Huai River Basin, northern China plain. Field experiments in 2005 and 2006 were conducted to study the response of aerobic rice and winter wheat to sequential rates of nitrogen (N), phosphorus (P) and potassium (K) in aerobic ricewinter wheat (AR-WW) and winter wheat-aerobic rice (WW-AR) cropping sequences. Fertilizer treatments consisted of a complete NPK dose, a PK dose (N omission), a NK dose (P omission), a NP dose (K omission), and a control with no fertilizer input. Grain yields of crops with a complete NPK dose ranged from 3.7 to 3.8 t ha -1 and from 6.6 to 7.1 for aerobic rice' and 'winter wheat', respectively. N omissions caused yield reductions ranging from 0.5 to 0.8 t ha -1 and from 1.6 to 4.3 t ha -1 for rice and wheat, respectively. A single omission of P or K did not reduce rice and wheat yields, but a cumulative omission of P or K in a double cropping system significantly reduced wheat yields by 1.2-1.6 t ha -1 . N, P and K uptake of both crops were significantly influenced by fertilizer applications and indigenous soil nutrient supply. Nutrient omissions in a preceding crop reduced plant N and K contents and uptake additionally to direct effects of the fertilizer treatments in wheat, but not in rice. Apparent nutrient recoveries (ANR) differed strongly between 'aerobic rice' and 'winter wheat'; in rice: for N it ranged from 0.30 to 0.32, for P from 0.01 to 0.06, and for K from 0.03 to 0.19 and in wheat: for N from 0.49 to 0.71, for P from 0.09 to 0.15, and for K from 0.26 to 0.31. Further improvements of crop productivity as well as nutrient-use efficiencies, should be brought about by developing cropping systems, by an appropriate choice of adapted cultivars, by a site-and timespecific fertilizer management and by eliminating other yield-limiting factors. It is concluded that nutrient recommendations should not be based on the yield response of single crops only, but also on the after-effects on nutrient availability for succeeding crops. A whole cropping system approach is needed.

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“…The length of the delays is related to the type of drought, the temperature regimes, the period of occurrence of drought and the rice genotype Wopereis et al, 1996). Spikelet fertility is also influenced by drought.…”

Section: Effect Of Drought On Yield and Physiology Of Ricementioning

confidence: 99%

The effects of drought on rice cultivation in sub-Saharan Africa and its mitigation: A review

Noelle¹,

Rodrigue²,

Gnikoua³

2018

Afr. J. Agric. Res.

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Drought is the primary cause of yield loss in agriculture throughout the world, and is currently the most common reason for global food shortages. Three-quarter of the most severe droughts in the last ten years have been in Africa, the continent which already has the lowest level of crop production and drought adaptive capacity. The increased incidences of drought and erratic rainfall have thrown small holder farmers in Africa into deep poverty, hunger and malnutrition. In this paper, the drought situation in sub-Saharan Africa and its impact on rice production was reviewed. Rice is particularly vulnerable to droughts as it has higher water requirement as compared to other crops. The review has also highlighted physiological and molecular plant responses to drought, with special focus on effects of drought stress on rice grain yield and other related-traits. With climate change predicted to exacerbate the problem of water security in Africa, it is imperative that we develop robust, well-planned and informed strategies to mitigate against drought. Various drought mitigation strategies including breeding for drought tolerance and water harvesting and conservation techniques are also outlined. In order to adapt to drought, there is need for a broad based approach that includes development of appropriate policies, putting in place necessary water related investments and institutions as well as capacity building at various levels.

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Drought-stress responses of two lowland rice cultivars to soil water status

Cited by 167 publications

References 17 publications

A Drought-Inducible Transcription Factor Delays Reproductive Timing in Rice

A Drought-Inducible Transcription Factor Delays Reproductive Timing in Rice

Crop response of aerobic rice and winter wheat to nitrogen, phosphorus and potassium in a double cropping system

The effects of drought on rice cultivation in sub-Saharan Africa and its mitigation: A review

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