Optimization of Irrigation and Nitrogen Regimes for Rapeseed Production Under Drought Stress

Shahraki, Abdolrazagh Danesh; Nadian, H.; Bakhshandeh, A.; Fathi, G.; Alamisaied, K.; Gharineh, M. H.

doi:10.3923/ja.2008.321.326

Cited by 8 publications

(7 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analyzing 10 years of field trial data for barley showed that the year-to-year rankings of different cultivars for yield and NUE were consistent, except in those years where there was a drought and significant water stress on the plants (Y. Anbessa & A.G. Good, unpublished data). In canola, the negative effects of drought are quite similar to those for N limitation, with loss of grain yield, decline of seed oil content, and change in lipid composition (33,92).…”

Section: Drought: the Key Factor That Interacts With Nitrogen Uptake mentioning

confidence: 95%

The Genetics of Nitrogen Use Efficiency in Crop Plants

et al. 2015

View full text Add to dashboard Cite

In the past 50 years, the application of synthetic nitrogen (N) fertilizer to farmland resulted in a dramatic increase in crop yields but with considerable negative impacts on the environment. New solutions are therefore needed to simultaneously increase yields while maintaining, or preferably decreasing, applied N to maximize the nitrogen use efficiency (NUE) of crops. In this review, we outline the definition of NUE, the selection and development of NUE crops, and the factors that interact with NUE. In particular, we emphasize the challenges of developing crop plants with enhanced NUE, using more classical genetic approaches based on utilizing existing allelic variation for NUE traits. The challenges of phenotyping, mapping quantitative trait loci (QTLs), and selecting candidate genes for NUE improvement are described. In addition, we highlight the importance of different factors that lead to changes in the NUE components of nitrogen uptake efficiency (NUpE) and nitrogen utilization efficiency (NUtE).

show abstract

Section: Drought: the Key Factor That Interacts With Nitrogen Uptake mentioning

confidence: 95%

The Genetics of Nitrogen Use Efficiency in Crop Plants

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Seed oil content declines after drought (Danesh-Shahraki et al 2008) and lipid composition changes (Bouchereau et al 1996). Furthermore, water stress slows leaf development (Qaderi et al 2006), restricts stomatal conductance (Mogensen et al 1997) and reduces leaf photosynthetic capacity (Gammelvind et al 1996; Müller et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen availability impacts oilseed rape (Brassica napus L.) plant water status and proline production efficiency under water-limited conditions

Albert

Cahérec

Niogret

et al. 2012

Planta

View full text Add to dashboard Cite

Large amounts of nitrogen (N) fertilizers are used in the production of oilseed rape. However, as low-input methods of crop management are introduced crops will need to withstand temporary N deficiency. In temperate areas, oilseed rape will also be affected by frequent drought periods. Here we evaluated the physiological and metabolic impact of nitrate limitation on the oilseed rape response to water deprivation. Different amounts of N fertilizer were applied to plants at the vegetative stage, which were then deprived of water and rehydrated. Both water and N depletion accelerated leaf senescence and reduced leaf development. N-deprived plants exhibited less pronounced symptoms of wilting during drought, probably because leaves were smaller and stomata were partially closed. Efficiency of proline production, a major stress-induced diversion of nitrogen metabolism, was assessed at different positions along the whole plant axis and related to leaf developmental stage and water status indices. Proline accumulation, preferentially in younger leaves, accounted for 25–85 % of the free amino acid pool. This was mainly due to a better capacity for proline synthesis in fully N-supplied plants whether they were subjected to drought or not, as deduced from the expression patterns of the proline metabolism BnP5CS and BnPDH genes. Although less proline accumulated in the oldest leaves, a significant amount was transported from senescing to emerging leaves. Moreover, during rehydration proline was readily recycled. Our results therefore suggest that proline plays a significant role in leaf N remobilization and in N use efficiency in oilseed rape.Electronic supplementary materialThe online version of this article (doi:10.1007/s00425-012-1636-8) contains supplementary material, which is available to authorized users.

show abstract

“…However, previous studies were primarily focused on phenotypic evaluations in greenhouse or growth chambers under uniform fertilizer applications. So, there is always a theoretical possibility of missing important loci if the crop growth conditions fail to include limiting environmental variables such as Nitrogen (N), a major limiting factor for Brassica production (Danesh-Shahraki et al, 2008). There is a positive correlation between soil N level and seed quality (Ahmadi and Bahrani, 2009).…”

Section: Introductionmentioning

confidence: 99%

Association Mapping of Seed Quality Traits Under Varying Conditions of Nitrogen Application in Brassica juncea L. Czern & Coss

et al. 2020

View full text Add to dashboard Cite

Indian mustard (Brassica juncea) is a major source of vegetable oil in the Indian subcontinent. The seed cake left after the oil extraction is used as livestock feed. We examined the genetic architecture of oil, protein, and glucosinolates by conducting a genome-wide association study (GWAS), using an association panel comprising 92 diverse genotypes. We conducted trait phenotyping over 2 years at two levels of nitrogen (N) application. Genotyping by sequencing was used to identify 66,835 loci, covering 18 chromosomes. Genetic diversity and phenotypic variations were high for the studied traits. Trait performances were stable when averaged over years and N levels. However, individual performances differed. General and mixed linear models were used to estimate the association between the SNP markers and the seed quality traits. Population structure, principal components (PCs) analysis, and discriminant analysis of principal components (DAPCs) were included as covariates to overcome the bias due to the population stratification. We identified 16, 23, and 27 loci associated with oil, protein, and glucosinolates, respectively. We also established LD patterns and haplotype structures for the candidate genes. The average block sizes were larger on A-genome chromosomes as compared to the B-genome chromosomes. Genetic associations differed over N levels. However, meta-analysis of GWAS datasets not only improved the power to recognize associations but also helped to identify common SNPs for oil and protein contents. Annotation of the genomic region around the identified SNPs led to the prediction of 21 orthologs of the functional candidate genes related to the biosynthesis of oil, protein, and glucosinolates. Notable among these are: LACS5 (A09), FAD6 (B05), ASN1 (A06), GTR2 (A06), CYP81G1 (B06), and MYB44 (B06). The identified loci will be very useful for marker-aided breeding for seed quality modifications in B. juncea.

show abstract

Optimization of Irrigation and Nitrogen Regimes for Rapeseed Production Under Drought Stress

Cited by 8 publications

References 24 publications

The Genetics of Nitrogen Use Efficiency in Crop Plants

The Genetics of Nitrogen Use Efficiency in Crop Plants

Nitrogen availability impacts oilseed rape (Brassica napus L.) plant water status and proline production efficiency under water-limited conditions

Association Mapping of Seed Quality Traits Under Varying Conditions of Nitrogen Application in Brassica juncea L. Czern & Coss

Contact Info

Product

Resources

About