Universidade de Lisboa Repositório da Universidade de Lisboa

Repositório da Universidade de Lisboa >
Faculdade de Ciências (FC) >
FC - Artigos em Revistas Internacionais >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10451/4556

Title: Effect of root temperature on carob growth: nitrate versus ammonium nutrition
Authors: Cruz, Cristina
Lips, S. Herman
Martins-Loução, Maria Amélia
Keywords: Alfarrobeira
Crescimento vegetal
Nitratos
Amonia
Nutrição
Temperatura
Issue Date: 1993
Publisher: Taylor & Francis
Citation: Journal of Plant Nutrition, 16(8), 1517-1530 (1993)
Abstract: The response of carob (Ceratonia siliqua L.) seedlings grown at different root zone temperatures affected by nitrate and ammonium nutrition was studied. When root temperatures ranged from 10 to 35°C, ammonium‐fed plants were significantly larger than nitrate‐fed plants. Ammonium‐fed plants displayed toxicity symptoms and were much smaller at 40°C root temperature in comparison with the nitrate‐fed plants grown at the same root temperature. Root/shoot ratio slightly increase with root temperature in ammonium‐ and nitrate‐fed plants in a similar way, and shoot demand per root unit decreased with root temperature between 15 and 25°C. There was a general increase in net photosynthesis with root temperature, though nitrate‐fed plants were more sensitive to low and ammonium‐fed plants to high temperatures. Increasing the root temperature of ammonium fed plants from 10 to 40°C leads to a 30% increase in the amount of photosynthates sent to the roots. The presence of ammonium resulted in the distribution of newly fixed carbon away from carbohydrates and into nitrogen compounds. Potassium, calcium, and nitrogen content of the plants also increased with increasing root temperature.
Peer Reviewed: yes
URI: http://hdl.handle.net/10451/4556
ISSN: 0190-4167
Appears in Collections:FC - Artigos em Revistas Internacionais

Files in This Item:

File Description SizeFormat
01904167_1517-1530.pdf2.13 MBAdobe PDFView/Open
Restrict Access. You can request a copy!
Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

  © Universidade de Lisboa / SIBUL
Alameda da Universidade | Cidade Universitária | 1649-004 Lisboa | Portugal
Tel. +351 217967624 | Fax +351 217933624 | repositorio@reitoria.ul.pt - Feedback - Statistics
DeGóis
  Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE