Data/hora: 11/06/2024 16:37:34

Provedor de dados: | Acta Scientiarum: Agronomy
País: | Brazil

Título:

Wheat (Triticum aestivum L.) Grain Filling and Dry Matter Translocation Responses to Source–Sink Modifications under postnathesis water and nitrogen deficiency - DOI: 10.4025/actasciagron.v32i1.6273

Wheat (Triticum aestivum L.) grain filling and dry matter partitioning responses to source:sink modifications under postanthesis water and nitrogen deficiency - DOI: 10.4025/actasciagron.v32i1.6273

Autores: | Madani, Ahad; Islamic Azad University; Rad, Amirhossein Shirani; Seed and Plant Improvement Institute; Pazoki, Alireza; Islamic Azad University; Nourmohammadi, Ghorban; Islamic Azad University; Zarghami, Reza; Agricultural Biotechnology Research Institute.
Data: | 2010-01-01
Ano: | 2010
Palavras-chave: | Current photosynthesis; Dry matter allocation; Grain filling rate; Stem reserves; Wheat (Triticum aestivum L.) Key words:  Current photosynthesis  Dry matter allocation  Grain filling rate  Stem reserves  Wheat (Triticum aestivum L.).
Resumo: | Abstract: Re-translocation of stem and spike reserves was investigated in source: sink restricted wheat subjected to water and nitrogen deficiency during seed filling. Either sink or source restriction significantly decreased the amount of current photosynthesis and its contribution to grain yield and Source limitation increased stem and spike reserves contribution to seed filling process. More amount of stem reserve mobilization in source restricted vs. control and sink restricted plants indicates that at rapid grain filling stage (14 days after anthesis to physiological maturity), stem dry matter decrease to provide assimilates for kernel after defoliation. In spike halved plants, drought stress significantly decreased grain yield indicates that when the sink is restricted, postanthesis water deficiency can increase sink limitation through lower grain filling rate and dry matter allocation to grain two weeks after anthesis at beginning of rapid grain  filling stage. In other hand, in spike halved plants, more nitrogen supply at anthesis increased grain yield because more dry matter allocation to grain not more current photosynthesis, But When the all leaves removed except flag leaf, more postanthesis nitrogen could not increase dry matter allocation to grain filling process, it show that postanthesis nitrogen supply increase grain yield through decrease in sink limitation than increase in source strength.      Key words:, Current photosynthesis, Dry matter allocation, Grain filling rate, Stem reserves, Wheat (Triticum aestivum L.)
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6273

10.4025/actasciagron.v32i1.6273

Editor: | Universidade Estadual de Maringá

Relação:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/6273/21289

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/6273/21290

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/6273/21394

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/6273/21395

Formato:

application/pdf

application/pdf

Fonte:

Acta Scientiarum. Agronomy; v. 32, n. 1 (2010); 145-151

Acta Scientiarum. Agronomy; v. 32, n. 1 (2010); 145-151

Fonte:

DECLARATION OF ORIGINALITY AND CESSATION OF COPYRIGHTI Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal. I also declare that once published in the Acta Scientiarum. Agronomy, a publication of the Universidade Estadual de Maringá, it will not be submitted by me or by any co-author to any other scientific communication mean. In my name and in the name of co-authors, I shall cede the copyright of the above mentioned article to the Universidade Estadual de Maringá and I declare that I know that the non-observance of this norm may make me liable for the penalties contemplated in the Law for the Protection of Authors’ Rights (Act 9609 of the 19th February 1998).

DECLARACIÓN DE ORIGINALIDAD Y CESIÓN DE DERECHOS DE AUTOR Declaro que el presente artículo es original, no fue sometido a la publicación en cualquier otro periódico nacional o internacional, sea en parte o en su totalidad. Declaro, aun, que una vez publicado en la revista Acta Scientiarum. Agronomy, editado por la Universidad Estadual de Maringá, éste jamás será sometido por mí o por cualquier uno de los demás coautores a cualquier otro periódico. A través de este instrumento, en mi nombre y en nombre de los demás coautores, por ventura existentes, cedo los derechos de autor del referido artículo a la Universidad Estadual de Maringá y declaro estar informado de que la no observancia de este compromiso someterá al infractor las sanciones y penas previstas en la Ley de Protección de Derechos de Autor (Nº9609, de 19/02/98).

DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAISDeclaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Agronomy, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).