Rice production and food security in Asian Mega deltas—A review on characteristics, vulnerabilities and agricultural adaptation options to cope with climate change

Schneider, P.; Asch, Folkard

doi:10.1111/jac.12415

Cited by 118 publications

(65 citation statements)

References 49 publications

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“…Ensuring future food security depends on strategies such as reducing crop losses due to environmental factors, as well as adoption of techniques that provide major gains in yields (Bailey‐Serres et al., 2019; Schneider & Asch, 2020). Faced with this challenge, our work seeks to assist in the selection of genotypes that are tolerant to limiting environmental conditions.…”

Section: Resultsmentioning

confidence: 99%

Physiological response and earliness of soybean genotypes to soil base saturation conditions

Andrade

Patinni

Pantaleão

et al. 2020

J Agronomy Crop Science

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Low base saturation (V) is one of the major abiotic stresses in the Brazilian Cerrado. Given this scenario, it is important to evaluate different physiological responses of genotypes in environments with and without liming aiming at select both liming responsive and low‐saturation tolerant genotypes. The hypothesis of this study is that contrasting V conditions provide changes in physiological performance of soybean genotypes. Thus, our objective was to select soybean genotypes in environments with recommended and low V. Two field experiments were carried in randomized block design with three replicates and 10 F3 soybean genotypes (P1, P2, P3, P4, P5, P6, P7, P8, P9 and P10). In the first experiment, genotypes were evaluated without V correction (V = 30%), while in the second experiment, a liming was performed three months before to raise V to 60%. The traits evaluated were as follows: calcium and magnesium contents, days for maturation, transpiration, net photosynthesis, stomatal conductance and internal CO2 concentration. Our findings indicate that the physiological performance of soybean genotypes depends on the saturation condition. The P9 genotype obtained the best physiological performance under recommended V and can be used to obtain F3:4 lines physiologically responsive to soil correction. The P5 genotype obtained the best physiological performance at low V and can be used to obtain F3:4 lines aiming at a higher tolerance to low saturation. Considering that the Brazilian soils, especially in the Cerrado, are mostly poorly fertile, our study provide crucial information for soybean breeding programmes aiming at selecting genotypes tolerant to limiting environmental conditions.

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Section: Resultsmentioning

confidence: 99%

Physiological response and earliness of soybean genotypes to soil base saturation conditions

Andrade

Patinni

Pantaleão

et al. 2020

J Agronomy Crop Science

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“…The area of the Mekong Delta in Vietnam is 39,000 km2, equivalent to 3,900,000 ha, or 4 million ha (Schneider and Asch, 2020). In 2018, 4,107,200 ha of rice were planted in the Mekong River Delta with 24,506,900 tons of rice produced.…”

Section: L96mentioning

confidence: 99%

“…The size of the Red River Delta in Vietnam is 15,000 km2, equivalent to 1.5 million ha (Schneider and Asch, 2020).…”

Section: L96mentioning

confidence: 99%

Response to Reviewer 1

Yuen¹

2020

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We thank Reviewer 1 for taking the time to critically evaluate our manuscript and for providing constructive comments to improve our paper. Below, we reproduce all the comments that we have received from the reviewers and detail how we will address them in the revised version of our manuscript. Reference details for the citations used in our responses are provided as a list at the end of this document. General comments My overall general criticisms are: 1. That more information/data/evidence is needed C1 NHESSD Interactive comment Printer-friendly version Discussion paper in support of the factors and processes that might impact rice cultivation on the two deltas investigated. At present there is mention of salt intrusion, erosion, sediment extraction, deltaic subsidence, fluvial sediment capture by dams, contamination, loss of soil quality, sea-level rise and increasing frequency/intensity of hazards. All of these are no doubt important for the long term sustainability of the MRD and RRD. But at the moment various statements by the authors about the relative importance of these processes need better grounding. There needs to be inclusion of published data where available, in order to help firm up the main arguments in the discussion. I fully understand that the overarching aim of the paper is to enable visualisation on how all the various influences are connected. But additional data from the literature are nonetheless still needed for proper substantiation. 2. Many minor grammatical errors need correcting throughout the manuscript. 3. Figures 2 and 3 need rethinking and should be improved. The case studies in support of the factors and processes that might impact rice cultivation in the two deltas were provided in the supplementary materials. However, we agree with the Reviewer that we should include this information in the manuscript to support our arguments. We will work on including some of the case studies listed in the supplementary materials in the main text. In addition, we will fix the minor grammatical errors throughout the manuscript. Lastly, we agree that Figures 2 and 3 can be improved. We have worked on improving them based on the Reviewer's specific comments. Specific comments Specific comments and recommendations are listed as below. These are in order as they appear in the manuscript. I trust that the authors will not feel these are unnecessarily critical, but are offered in the spirit of improving the paper for eventual publication.

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“…The frequency and intensity of droughts is expected to increase, promoting further desertification, particularly in Africa and Asia [ 5 ]. Rising sea levels also contribute to soil erosion and increased salinity and increased extreme weather events such as floods and cyclones will also reduce arable land mass [ 6 ]. The challenges posed by pests and pathogens, a rapidly growing global population, and unpredictable climactic conditions demand that we find new and innovative solutions to maintain healthy crops without losing yield.…”

Section: Introductionmentioning

confidence: 99%

dsRNA Uptake in Plant Pests and Pathogens: Insights into RNAi-Based Insect and Fungal Control Technology

Wytinck

Manchur

et al. 2020

Plants

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Efforts to develop more environmentally friendly alternatives to traditional broad-spectrum pesticides in agriculture have recently turned to RNA interference (RNAi) technology. With the built-in, sequence-specific knockdown of gene targets following delivery of double-stranded RNA (dsRNA), RNAi offers the promise of controlling pests and pathogens without adversely affecting non-target species. Significant advances in the efficacy of this technology have been observed in a wide range of species, including many insect pests and fungal pathogens. Two different dsRNA application methods are being developed. First, host induced gene silencing (HIGS) harnesses dsRNA production through the thoughtful and precise engineering of transgenic plants and second, spray induced gene silencing (SIGS) that uses surface applications of a topically applied dsRNA molecule. Regardless of the dsRNA delivery method, one aspect that is critical to the success of RNAi is the ability of the target organism to internalize the dsRNA and take advantage of the host RNAi cellular machinery. The efficiency of dsRNA uptake mechanisms varies across species, and in some uptake is negligible, rendering them effectively resistant to this new generation of control technologies. If RNAi-based methods of control are to be used widely, it is critically important to understand the mechanisms underpinning dsRNA uptake. Understanding dsRNA uptake mechanisms will also provide insight into the design and formulation of dsRNAs for improved delivery and provide clues into the development of potential host resistance to these technologies.

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Rice production and food security in Asian Mega deltas—A review on characteristics, vulnerabilities and agricultural adaptation options to cope with climate change

Cited by 118 publications

References 49 publications

Physiological response and earliness of soybean genotypes to soil base saturation conditions

Physiological response and earliness of soybean genotypes to soil base saturation conditions

Response to Reviewer 1

dsRNA Uptake in Plant Pests and Pathogens: Insights into RNAi-Based Insect and Fungal Control Technology

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