THE ROLE OF FACTORS INFLUENCING REPRODUCTION IN REDUCTION OF POPULATION SIZE OF ATRAPHAXIS SUAEDIFOLIA, A RARE ENDEMIC SPECIES FROM NORTHWEST OF IRAN

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HAJIBOLAND R.; TALEB POUR A.H.; SAEDI N.

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Journal: IRANIAN JOURNAL OF BIOLOGY Year:2011 | Volume:24 | Issue:4 Page(s): 566-577

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Title

THE ROLE OF FACTORS INFLUENCING REPRODUCTION IN REDUCTION OF POPULATION SIZE OF ATRAPHAXIS SUAEDIFOLIA, A RARE ENDEMIC SPECIES FROM NORTHWEST OF IRAN

Author(s)

HAJIBOLAND R. | TALEB POUR A.H. | SAEDI N. | Issue Writer Certificate

Keywords

ATRAPHAXIS SUAEDIFOLIAQ2

MARNY SOILSQ2

ENDANGERED SPECIESQ2

Abstract

ATRAPHAXIS SUAEDIFOLIA Jaub. & Spach (Polygonaceae) is an endemic species from East Azerbaijan province, and grow around Tabriz. Our previous studies showed that this species is faced serious extinction hazard and its natural habitats are being contracted rapidly, so that, we have identified only three locations as habitat for this species. In order to find the reasons for reduction of its population size, factors of external and internal origin influencing reproduction of this species were studied. Results showed that pollen grains have a high mortality (47%) and a high proportion of seeds are hollow (53-71%) due to unfertilized ovules or failure of subsequent development. It was demonstrated that, this species produces four types of seeds regarding size and color, including a great number of small and brown seeds with no germination potential. The highest germination percentage (29%) and bigger seedlings was produced by black and big seeds, which are selectively fed by insects. It was also observed that, this species have a potential for propagation via rhizomes, however, a low penetration depth of soil which is characteristic of MARNY SOILS inhibits rhizome formation in its natural habitats. In this work, the hypothesis of high rate of homozygosity as the consequence of inbreeding was tested and it was observed that self- and cross-pollinated plants produce similar amounts of each type of seeds. In conclusion, many factors of internal origin including high rate of pollen mortality, high proportion of hollow seeds and special requirements for germination; and external factors including intensive feeding of seeds by insects, adverse ecological factors inhibiting germination and establishment of seedlings and lower possibility for regeneration by rhizomes involve in the reduction of reproduction and population size of in this species. Thus, all management strategies for conservation of this species are of high necessity and priority.

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APA: Copy

HAJIBOLAND, R., TALEB POUR, A.H., & SAEDI, N.. (2011). THE ROLE OF FACTORS INFLUENCING REPRODUCTION IN REDUCTION OF POPULATION SIZE OF ATRAPHAXIS SUAEDIFOLIA, A RARE ENDEMIC SPECIES FROM NORTHWEST OF IRAN. IRANIAN JOURNAL OF BIOLOGY, 24(4), 566-577. SID. https://sid.ir/paper/21432/en

Vancouver: Copy

HAJIBOLAND R., TALEB POUR A.H., SAEDI N.. THE ROLE OF FACTORS INFLUENCING REPRODUCTION IN REDUCTION OF POPULATION SIZE OF ATRAPHAXIS SUAEDIFOLIA, A RARE ENDEMIC SPECIES FROM NORTHWEST OF IRAN. IRANIAN JOURNAL OF BIOLOGY[Internet]. 2011;24(4):566-577. Available from: https://sid.ir/paper/21432/en

IEEE: Copy

R. HAJIBOLAND, A.H. TALEB POUR, and N. SAEDI, “THE ROLE OF FACTORS INFLUENCING REPRODUCTION IN REDUCTION OF POPULATION SIZE OF ATRAPHAXIS SUAEDIFOLIA, A RARE ENDEMIC SPECIES FROM NORTHWEST OF IRAN,” IRANIAN JOURNAL OF BIOLOGY, vol. 24, no. 4, pp. 566–577, 2011, [Online]. Available: https://sid.ir/paper/21432/en

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