BnaA02.NIP6;1a encodes a boron transporter required for plant development under boron deficiency in Brassica napus

Abstract Heterosis or hybrid vigor has been used widely for more than a decade in Canola (Brassica napus) production. Canola hybrids show heterosis in a variety of traits compared to parents, including increased biomass at the early stages of seedling establishment, which is a critical developmental step that impacts future plant growth and seed yield. In this study, we examined transcriptomes of two parental lines, Garnet (Gar) and NX0052 (0052), and their reciprocal hybrids, Gar/0052, at 4 and 8 days after sowing (DAS). In hybrids, early seedling biomass heterosis is correlated with earlier expression of genes in photosynthesis pathways relative to parents. The hybrids also showed early expression of genes in the auxin biosynthesis pathway, consistent with the higher auxin concentrations detected in hybrid seedlings at 4 DAS. Auxin is a key phytohormone that regulates plant development promoting cell expansion and cell proliferation. Consistent with the increased levels of auxin, hybrids have larger and more palisade cells than the parents at the same time point. We propose a possible mechanism of early biomass heterosis through the early establishment of photosynthesis and auxin biosynthesis, providing insights into how transcriptional changes in hybrids are translated into phenotypical heterosis. This finding could be utilized in future Canola breeding to identify hybrid combinations with the superior early seedling establishment and strong levels of hybrid vigor in later plant development.

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Occurrence of Diaretiella rapae (Mc´Intosh, 1855) (Hymenoptera: Aphidiidae) Parasitising Lipaphis erysimi (Kaltenbach, 1843) and Brevicoryne brassicae (L. 1758) (Homoptera: Aphididae) in Brassica napus in Mato Grosso do Sul

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132002000100007 ◽

2002 ◽

Vol 45 (1) ◽

pp. 41-46 ◽

Cited By ~ 9

Author(s):

Rosilda Mara Mussury ◽

Wedson Desidério Fernandes

Keyword(s):

Brassica Napus ◽

Plant Development ◽

Brevicoryne Brassicae ◽

Lipaphis Erysimi ◽

Mato Grosso ◽

Flowering Phase ◽

Parasitism Level ◽

Sample Method ◽

Mato Grosso Do Sul ◽

Sweep Net

The occurrence of Diaretiella rapae parasitising Lipaphis erysimi and Brevicoryne brassicae in canola field (Brassica napus) was evaluated through two sample methods in Dourados-MS. The methods, used weekly, were: entomologic sweep net and plants sacking. The aphids population was observed from initial to the senescence plant development. Aphids were more abundant during the flowering phase, and they were usually located in the stems of the inflorescence and development fruits. In this phase the largest parasitism level for D. rapae (89,7%) occurred. The sample method with a sweep net captured significantly (t=4,484, P <= 0,01) more D. rapae while sacking method captured more parasitise aphids (t=2,199 with P <= 0,05) and active aphids (t=3,513, P <= 0,01).

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Genome-Wide Identification and Characterization of the Aquaporin Gene Family and Transcriptional Responses to Boron Deficiency in Brassica napus

Frontiers in Plant Science ◽

10.3389/fpls.2017.01336 ◽

2017 ◽

Vol 8 ◽

Cited By ~ 20

Author(s):

Dan Yuan ◽

Wei Li ◽

Yingpeng Hua ◽

Graham J. King ◽

Fangsen Xu ◽

...

Keyword(s):

Brassica Napus ◽

Gene Family ◽

Boron Deficiency ◽

Transcriptional Responses ◽

Genome Wide ◽

Aquaporin Gene ◽

Identification And Characterization

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Vascular tissue-specific expression of BnaC4.BOR1;1c, an efflux boron transporter gene, is regulated in response to boron availability for efficient boron acquisition in Brassica napus

Plant and Soil ◽

10.1007/s11104-021-04985-y ◽

2021 ◽

Author(s):

Sheliang Wang ◽

Ling Liu ◽

Dan Zou ◽

Yupu Huang ◽

Zhe Zhao ◽

...

Keyword(s):

Brassica Napus ◽

Vascular Tissue ◽

Transporter Gene ◽

Specific Expression ◽

Tissue Specific ◽

Tissue Specific Expression ◽

Boron Transporter

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Prognosis of boron deficiency in oilseed rape (Brassica napus) by plant analysis

Australian Journal of Agricultural Research ◽

10.1071/a97156 ◽

1998 ◽

Vol 49 (5) ◽

pp. 867 ◽

Cited By ~ 14

Author(s):

Youzhang Wei ◽

R. W. Bell ◽

Yuai Yang ◽

Zhengqian Ye ◽

Ke Wang ◽

...

Keyword(s):

Brassica Napus ◽

Oilseed Rape ◽

Seed Yield ◽

Field Experiments ◽

Seasonal Effects ◽

East China ◽

Yield Response ◽

Boron Deficiency ◽

Plant Analysis ◽

Critical Range

In areas where soils are low in boron (B), the ability to predict B deficiency by plant analysis depends on the development of calibrated standards and offers the potential of preventing or minimising losses in seed yield. The present study aimed at establishing relationships between seed yield in winter oilseed rape (Brassica napus) and B concentrations in defined leaves during growth before fiowering and from them to determine critical values for the prognosis of B deficiency. Oilseed rape cv. Zheyouyou 2 was grown in 10 field experiments in Zhejiang province, south-east China, with B rates from 0 to 3· 3 kg/ha. At 4 of the sites, oilseed rape was resown in the following year to assess seasonal effects on critical concentrations. Experiments were conducted on the 3 main soil groups on which oilseed rape is grown in south-east China. The youngest open leaf (YOL) was selected as the sampling part because its B concentrations were strongly responsive to increasing B supply and well correlated with seed yield response. In this study, the best model of the relationship between YOL B concentration and yield was the Mitscherlich equation, which explained 68-89% of the variation in the data. The calculated critical range in the YOL at seedling stage was 20-25 mg B/kg and appeared to be valid in 2 seasons and on 3 soil types. The critical B range for prognosis of B deficiency was found to predict consistently those crops in farmers" fields that had low seed yield and low soil B, but needs to be evaluated in other growing environments especially those for spring rape.

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