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Comparative Leaf Anatomical Studies Reveal Photosynthetic Pathways type in Guinea Grass (Panicum maximum Jacq.) Accessions and their Interspecific Lineage
Kranz anatomy studied among Panicum maximum ac-cessions showed wide variation for chloroplast in bundle sheath (BS), mesophyll and mestome. Geno-types in clusters E and F, with <20% pigmentation in BS, had lineage with P. prionitis, P. rivulare, P. laxum, P. hylacicum and P. bisulcatum, whereas genotypes in clusters B, C and D with high pigmentation were C4 types having lineage with P. antidotale, P. coloratum and P. miliaceum. Genotypes with ~50% pigmentation in cluster A were intermediate types and might have evolved either through intraspecies crossing or species like P. milioides, P. decipens, P. schenckii and P. petersoni.
Keywords
C3–C4 Photosynthesis, Germplasm, Guinea Grass, Interspecific Lineage, Leaf Anatomy.
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