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Title

COMPARATIVE LEAF ANATOMY OF THE GENUS HORDEUM L. (POACEAE) IN IRAQ

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Abstract

 IN THIS STUDY LEAF ANATOMICAL CHARACTERS AMONG THE SPECIES OF THE GENUS HORDEUM L. HAVE BEEN EVALUATED. IN IRAQ, HORDEUM ISREPRESENTED BY EIGHT SPECIES, NAMELY HORDEUMBULBOSUM L., H.DISTICHON L., H.GENICULATUM ALL., H.GLAUCUMSTEUD., H.LEPORINUM LINK, H.MARINUM VAR. MARINUMHUDS., H.MARINUM VAR. PUBESCENS (GUSS.) NEVSKI, H. SPONTANEUM VAR. SPONTANEUM C. KOCH, H.SPONTANEUM VAR. PROSKOWETZIINAB., AND H. VULGARE L. THIS GENUS ONE OF THE MOST ECONOMICALLY IMPORTANT CEREAL CROPS IN THE TRIBE TRITICEAE, HAS A WORLDWIDE DISTRIBUTION MAINLY IN TEMPERATE AND DRY REGIONS OF THE WORLD. THE MAIN OBJECTIVE OF THIS STUDY IS TO ASSES THE SIGNIFICANCE OF ANATOMICAL CHARACTERISTICS OF THE LEAVES. FOR THIS PURPOSE TRANSVERSE SECTIONS AND LEAF SURFACES WERE EXAMINED. ANATOMIC FEATURES SHOW THAT LEAF BLADES VARY BETWEEN THE TAXA IN BOTH QUALITATIVE AND QUANTITATIVE VALUES. SCLERENCHYMATIC CELLS, SILICA BODIES, AND STOMATA, FURROW AND RIBS PROPERTIES, THE EXISTENCE OF MIDRIB AND BULLIFORM CELLS, AND INDUMENTUM PROPERTIES SUCH AS LENGTH OF PRICKLES AND MACRO-HAIRS ARE ALL INCLUDED IN THESE DIAGNOSTIC CHARACTERISTICS.

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