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Functional Analysis of the Genotypic Differences in Response of Pea (Pisum sativum L.) to calcareous-induced Iron deficiency

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Phyton-International Journal of Experimental Botany 2023年第2期92卷 521-536页

作者： Sameh Barhoumi Hasna Ellouzi Abdelmajid Krouma Laboratory of Ecosystems and Biodiversity in Arid Land of Tunisia Faculty of SciencesUniversity of SfaxSfax3000Tunisia Centre of Biotechnology of Borj Cedria Hammam Lif2050Tunisia Faculty of Sciences and Techniques University of KairouanKairouan9100Tunisia

Lime-induced iron chlorosis is a major nutritional disorder causing severe plant growth and yield reduction in the calcareous soils of *** understanding the behavior of key metabolic functions of peas on calcareous soils,the identification of useful traits of tolerance,and the exploration of the genotypic differences in response to this constraint remain the most efficient approaches due to their coast,environmental benefits,and *** this purpose,a greenhouse experiment was conducted on three pea genotypes(Alexandra:Alex,Douce de provence:DP,and Merveille de Kelvedon:MK)cultivated on calcareous soil(fe-deficient)and fertile soil(control).Plant growth,SPAD index,iron nutrition and distribution,photosynthesis,and antioxidant enzymes were deeply analyzed to discriminate genotypic ***-induced iron deficiency reduced SPAD index,plant growth,net photosynthesis,and tissue fe content against a significant stimulation of the oxidative stress indicators,H2O2 and Malondialdehyde(MDA).Moreover,we reported a significant induction of SOD and CAT activity in shoots and roots of the Alexandra *** use efficiency increased on calcareous soil and clearly discriminated the studied *** genotype was found to be the most tolerant to lime-induced iron *** genotype protects its tissues against oxidative stress by stimulating enzyme activities(SOD and CAT)and develops significant efficiency of fe uptake,translocation to shoots and use when cultivated on calcareous soil.

关键词： calcareous-induced fe deficiency catalase fe use efficiency photosynthesis superoxide dismutase

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