Abstract
Spring droughts are expected to become more frequent in Central Europe as a result of climate change. Their coincidence with flowering of biennial crops like winter oilseed rape (Brassica napus) can cause major impact for yield development. However, no data is available on the diversity of genetic regulation of drought tolerance during this stage under realistic conditions. Here, we assessed the phenotypic plasticity of drought response for eight diverse B. napus accessions under field-like conditions and linked their stress response to gene and miRNA expression during early and late stress. We observed highly diverse responses, both on the phenotypic and on the gene expression level. Our data suggest that drought tolerant accessions have more effective molecular protection mechanisms like ROS scavenging, source/sink ratio and regulation of developmental timing, compared to otherwise phenotypically similar accessions. Bna.MAP3K13.C05 expression was found to be protective independently of the tolerance mechanism, indicating cross-talk to nitrogen signaling. Moreover, we identified putative miRNA genes in the B. napus genome which respond to stress and may also be involved in protective mechanisms, representing possible breeding targets.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
Oilseed rape accessions differed in phenotypic drought responses and gene expression.
Verbatim
e0“We observed highly diverse responses, both on the phenotypic and on the gene expression level”
t0“biennial oil crop”
Claim · model-written summary
Drought-tolerant accessions may have stronger ROS scavenging, source-sink and developmental timing protection.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Material
- drought tolerant accessionse0
- Outcome
- more effective molecular protection mechanismse0
- Qualifier
- ROS scavenging, source/sink ratio and regulation of developmental timinge0
- Comparator
- otherwise phenotypically similar accessionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“drought tolerant accessions have more effective molecular protection mechanisms like ROS scavenging, source/sink ratio and regulation of developmental timing, compared to otherwise phenotypically similar accessions”
e1“winter oilseed rape (Brassica napus)”
Claim · model-written summary
Bna.MAP3K13.C05 expression was protective across tolerance mechanisms.
- Taxon
- Brassica napusBrassica napuse1
- Gene
- Bna.MAP3K13.C05e0
- Outcome
- protectivee0
- Direction
- protectivee0
- Qualifier
- independently of the tolerance mechanisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bna.MAP3K13.C05 expression was found to be protective independently of the tolerance mechanism”
e1“winter oilseed rape (Brassica napus)”
Claim · model-written summary
Putative miRNA genes in the B. napus genome responded to stress.
- Taxon
- B. napusBrassica napuse0
- Gene
- miRNA genese0
- Outcome
- respond to stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“putative miRNA genes in the B. napus genome which respond to stress and may also be involved in protective mechanisms”