ON THE REPRODUCTIVE BIOLOGY OF ALKANNA TINCTORIA (BORAGINACEAE)

被引：1
作者：
Yankova-Tsvetkova, Elina [1 ]
Yurukova-Grancharova, Petka [1 ]
Nikolova, Rozalia [1 ]
机构：
[1] Bulgarian Acad Sci, Inst Biodivers & Ecosyst Res, Akad G Bonchev St,Bl 23, Sofia 1113, Bulgaria
来源：
COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES | 2022年 / 75卷 / 07期
关键词：
Alkanna tinctoria; Boraginaceae; embryology; pollen and seed viability; reproductive capacity; EMBRYOLOGY;
D O I：
10.7546/CRABS.2022.07.08
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In the present study main parameters of reproductive biology as features of embryological structures and processes as well as the pollen and seed viability of Alkanna tinctoria, an endangered useful species of Bulgarian flora were established. In its studied Bulgarian populations pollen viability above 90% and seed viability - between 32% and 64% were determined. The anthers are tetrasporangiate and their wall develops according to Dicotyledonous-type, consisting of an epidermis, fibrous endothecium, an ephemeral middle layer and secretory tapetum. The microsporogenesis is simultaneous and in the anthers tetrahedral and isobilateral microspore tetrads are formed. The mature pollen is three-celled at shedding stage. The ovule is anatropous, teniunucellate, unitegmic. Embryo sac (ES) develops according to the Polygonum (monosporic)-type. The embryo development follows the Asterad-type. The endosperm in the mature seeds has been completely consumed. As a result of the present study A. tinctoria is characterized as a sexually reproducing species.
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页码：1000 / 1008
页数：9
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