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2010 | 32 | 6 |
Tytuł artykułu

Phenotypic indicators of NaCl tolerance levels in rice seedlings: variations in development and leaf anatomy Shantanu Devidas

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The aim of this research is the early identification of distinctive responses to NaCl in rice cultivars that would indicate further stress-related effects in mature plants. For this purpose, we analysed some developmental and anatomical features in control and NaCl-stressed seedlings of two Japonica rice cultivars (Bomba and Bahia). Responses ascribed to osmotic stress were differentiated from those related to the ionic component of salinity by using in parallel a non-penetrating osmoticum (sorbitol). The general patterns of reduction in growth and variations in anatomical features of second leaf sections were similar in both cultivars. The main difference between them was the intensity of the response as a function of the stress agent. In general, the effect of NaCl was significantly stronger than that of sorbitol in cv. Bomba, whereas in cv. Bahia the effects of both stress agents were comparable. In this regard, the size of epidermal and bulliform cells as well as dimensions related to the vascular system, including xylem vessels, increased significantly in NaCl-stressed cv. Bomba leaves. This enlargement of xylem vessels agrees with the observed decrease in the rate of eosin transport and appears to be a distinctive anatomical indicator of NaCl sensitivity. The further impact of salinity on grain yield was proved to be stronger in cv. Bomba plants than in those of cv. Bahia.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
32
Numer
6
Opis fizyczny
p.1161-1169,fig.,ref.
Twórcy
  • Departamento de Biologı´a Vegetal, Facultad de Biologı´a, Universidad de Valencia, Avda. Dr Moliner 50, Burjassot, 46100 Valencia, Spain
  • Instituto Cavanilles de Biodiversidad y Biologı´a Evolutiva, y Departamento de Bota´nica, Universidad de Valencia, Facultad de Biologı´a, Avda. Dr Moliner 50, Burjassot, 46100 Valencia, Spain
autor
  • Instituto de Agrobiotecnologı´a, Carretera Mutilva Baja s/n, Mutilva Baja, 31192 Navarra, Spain
  • Instituto Cavanilles de Biodiversidad y Biologı´a Evolutiva, y Departamento de Bota´nica, Universidad de Valencia, Facultad de Biologı´a, Avda. Dr Moliner 50, Burjassot, 46100 Valencia, Spain
  • Departamento de Biologı´a Vegetal, Facultad de Biologı´a, Universidad de Valencia, Avda. Dr Moliner 50, Burjassot, 46100 Valencia, Spain
Bibliografia
  • Alam MZ, Stuchbury T, Naylor REL, Rashid MA (2004) Effect of salinity on growth of some modern rice cultivars. J Agron 3:1–10
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  • Baum SF, Tran PN, Silk WK (2000) Effects of salinity on xylem structure and water use in growing leaves of sorghum. New Phytol 146:119–127
  • Boughalleb F, Denden M, Tiba BB (2009) Anatomical changes induced by increasing NaCl salinity in three fodder shrubs, Nitraria retusa, Artiplex halimus and Medicago arborea. Acta Physiol Plant 31:947–960
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  • Sobrado MA (2007) Relationship of water transport to anatomical features in the mangrove Laguncularia racemosa grown under contrasting salinity. New Phytol 173:584–591
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  • Yamaguchi T, Blumwald E (2005) Developing salt-tolerant crop plants: challenges and opportunities. Trends Plant Sci 10:615–620
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-005bb28f-d1f2-4c2c-99e1-e6e09dd078ac
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