Waterlogging affect the development, yield and components, chlorophyll content and chlorophyll fluorescence of six bread W heat genotypes (Tri Ticum aes Tivum l .)
Year: 2014
Type: article
Abstract: During rainy crop seasons waterlogging is a serious environmental stress influencing wheat development and production inthe North West zones of Tunisia. A field trial was conducted during the two cropping seasons 2005/06 and 2006/07at Oued-BéjaAgricultural Experimental Unit (36°44’N; 9°13’E) under rainfed and waterlogging conditions in order to evaluate floodingeffects on development, chlorophyll fluorescence, chlorophyll content, yield and components for six bread wheat genotypes(Triticum aestivum L.). The floodwater state was applied during 28 days at the tillage stage. The results indicated that waterlogginghas significantly affected (P<0.01) the vegetative development, physiological traits and yield and components for allstudied genotypes. Waterlogging delayed the heading by 9.6 days and reduced the plant height and the tiller number per plant(TN/P) by 25.4% and 44.2% respectively. This vegetative growth limitation resulted in an average decrease of 55.9% in grainyield. The genotype Salammbô presented the lowest levels of yield reduction (≈ 39% and 39.6%) against a reduction of 71.8%and 76.5% recorded for cv. Vaga. In addition, clear variation in chlorophyll fluorescence (Maximum quantum efficiency: Fv/Fm) and chlorophyll content were observed between controls and waterlogged plants. For chlorophyll content index, minimadecreases of 41.3% and 44.5% were recorded after 28 days of waterlogging respectively for cv. Salammbô and cv. Utiqueagainst maxima of 58.5%, 58.9% and 60.7% recorded for cv. Vaga, FxA and cv. Ariana, respectively. Under water excess conditionsFv/Fm of Vaga and Ariana genotypes were more affected than cvs. Salammbô and Utique.
Authors: Moez Amri, Mouhamed Ouni, M. Ben Salem
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2186119667