Plantas deficientes em nitrogênio apresentam crescimento reduzido, dependendo da severidade da deficiência. Crescimento foliar é inibido; folhas jovens são inibidas em particular. O crescimento longitudinal da parte aérea é inibido, e assim ocorre seu engrossamento. A coloração das plantas deficientes em nitrogênio normalmente varia de verde-pálido a verde-amarelado devido a síntese reduzida de cloroplasto e clorofila. As folhas começam a murchar e secar, tornando-se marrom-amareladas a marrom.
Sintomas
- A planta toda apresenta coloração pálida a verde-amarelada
- Senescência precoce das folhas velhas
- Crescimento radicular aumentado e crescimento atrofiado da parte aérea resultando em baixa relação parte aérea/raiz
Processos importantes
- Nitrogênio é muito móvel no solo e na planta
- Absorção de nitrogênio pode ser reduzida em pH baixo (<4)
- A deficiência de nitrogênio é comum na natureza. As plantas desenvolveram mecanismos de resposta à deficiência de nitrogênio, os quais incluem regulação hormonal do crescimento radicular, e fechamento de aquaporos, o que resulta em estresse hídrico na parte aérea e consequente redução no seu crescimento
Spotlight
Study shows ‘steep, cheap and deep’ roots help corn plants deal with drought
Jagdeep Sidhu and Sam Walker win awards at 2022 CSA (Crop Science, Soil Science, Agronomy Societies) meetings
Jonathan Lynch recognized as highly cited researcher in 2022 by Clarivate
Jonathan Lynch recognized as highly cited researcher in 2021 by Clarivate
Publication receives award from Crop Science Society of America
Tools for breeding cowpea with better roots highlighted in CSA news article
Breeding Beans for Better Roots
Professor Kathleen Brown retires after 41 years
Amelia Henry receives humanitarian award
Jagdeep Sidhu receives research award
Roots lab research focus of podcast from West German Public Radio
Newly discovered trait helps plants grow deeper roots in dry, compacted soils | Penn State University
CSA news article on Roots Lab work with bean breeding
Jagdeep Sidhu Receives College Research Funding
Jonathan Lynch recognized as Highly Cited Researcher by Clarivate
Graduate student receives special award for early career contributions to ASPB
LAT root image wins photo competition of Egyptian Academy of Scientific Research
Graduate student awarded Outstanding Agricultural Graduate Student Award from AASIO
News story on bean root architecture reaches 6 million people, worth $240,000
Bean root architecture results highlighted in CSSA News
Field work proceeds with physical distancing, safety precautions
Spotlight
Study shows ‘steep, cheap and deep’ roots help corn plants deal with drought
Jagdeep Sidhu and Sam Walker win awards at 2022 CSA (Crop Science, Soil Science, Agronomy Societies) meetings
Jonathan Lynch recognized as highly cited researcher in 2022 by Clarivate
Jonathan Lynch recognized as highly cited researcher in 2021 by Clarivate
Publication receives award from Crop Science Society of America
Tools for breeding cowpea with better roots highlighted in CSA news article
Breeding Beans for Better Roots
Professor Kathleen Brown retires after 41 years
Amelia Henry receives humanitarian award
Jagdeep Sidhu receives research award
Roots lab research focus of podcast from West German Public Radio
Newly discovered trait helps plants grow deeper roots in dry, compacted soils | Penn State University
CSA news article on Roots Lab work with bean breeding
Jagdeep Sidhu Receives College Research Funding
Jonathan Lynch recognized as Highly Cited Researcher by Clarivate
Graduate student receives special award for early career contributions to ASPB
LAT root image wins photo competition of Egyptian Academy of Scientific Research
Graduate student awarded Outstanding Agricultural Graduate Student Award from AASIO
News story on bean root architecture reaches 6 million people, worth $240,000
Bean root architecture results highlighted in CSSA News
Field work proceeds with physical distancing, safety precautions