Screening methods for waterlogging tolerance in lucerne: comparative analysis of waterlogging effects on chlorophyll fluorescence, photosynthesis, biomass and chlorophyll content

Functional Plant Biology : FPB
Christiane F Smethurst, Sergey Shabala

Abstract

Waterlogging is a serious environmental stress on lucerne (Medicago sativa) affecting its agronomic performance. To facilitate the breeding process, efficient tools to screen a population of lucerne cultivars are needed. In this study, a comparative analysis of waterlogging effects on leaf photosynthesis, pigment composition, PSII photochemistry, and plant growth characteristics was undertaken using four different lucerne cultivars (Aurora, Hunter River, L153 and Sequel HR). Two-month-old plants, grown in half-strength Hoagland nutrient solution, were waterlogged for 16 days, and plant physiological characteristics were monitored at regular intervals (every few days). All cultivars had significantly reduced fresh and dry weight for both shoots and roots after 16 days of waterlogging. Root biomass showed a greater percentage of reduction than did shoot biomass. As waterlogging stress developed, chlorophyll content, CO2 assimilation rate, transpiration rate, stomatal conductance and maximal quantum efficiency of PSII (Fv/Fm) decreased significantly. Chlorophyll a and b content gradually decreased over the time of the experiment in the stressed cultivars, and leaf chlorosis became increasingly evident. Although most of the paramet...Continue Reading

Citations

Jun 22, 2016·Journal of Experimental Botany·Gustavo G Striker, Timothy D Colmer
Aug 7, 2017·Isotopes in Environmental and Health Studies·Fang Li, Atsuko Sugimoto
Apr 6, 2005·Journal of Experimental Botany·Sergey ShabalaIan Newman
Aug 25, 2010·Journal of Experimental Botany·Yuda HariadiSergey Shabala
Apr 1, 2007·Functional Plant Biology : FPB·Jiayin PangSergey Shabala
Sep 1, 2008·Functional Plant Biology : FPB·Christiane F SmethurstSergey Shabala
Mar 23, 2011·Plant Science : an International Journal of Experimental Plant Biology·Xiaoqing YuYiwei Jiang

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