Spikelet movements, anther extrusion and pollen production in wheat cultivars with contrasting tendencies to cleistogamy
| Autor: | Alicja Dołkin-Lewko, Bożena Denisow, Monika Rakoczy-Trojanowska, Barbara Łotocka, Urszula Zajączkowska |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Crops Agricultural Genotype Dacanto Turgor pressure Stamen Triticum aestivum Cleistogamy Pollen dispersion Plant Science Flowers Biology medicine.disease_cause Genes Plant 01 natural sciences 03 medical and health sciences Gene Expression Regulation Plant Spikelet anatomy lcsh:Botany Pollen medicine Cultivar Pollination Lemma kinetics Flower opening Triticum Wheat breeding Water transport food and beverages Ideotype Marker-assisted selection lcsh:QK1-989 Horticulture Piko 030104 developmental biology Hybridization Genetic Poland 010606 plant biology & botany Research Article |
| Zdroj: | BMC Plant Biology BMC Plant Biology, Vol 21, Iss 1, Pp 1-15 (2021) |
| ISSN: | 1471-2229 |
| Popis: | Background Cleistogamic flowers are a main barrier in pollen dispersal for cross-pollination necessary in wheat hybrid breeding. The aim of our study was to gain new knowledge on the biology of wheat flowering, in particular on the differences between the cleisto- and chasmogamic forms which has certainly cognitive significance, but it can also be used in practice when seeking a female and male ideotypes for cross hybridization. Results We characterized the most significant features defining the flowering specificity in two wheat cultivars with contrasting tendency to cleistogamy: Piko (chasmogamous) and Dacanto (cleistogamous). In the field observations we assessed diurnal pattern of anther extrusion and anther extrusion capacity. For the first time we adapted the time lapse method for measuring kinetics of the spikelet movement and 3-D image correlation technique for the non-invasive measurements of potential deformations of the spikelet lemmas. We found that the two cultivars differ in the potential of pollen dispersion for-cross-pollination and in the spikelet kinetics. We also described some anatomical traits that can have potential functional role in floret opening. None of the cultivars showed any symptoms of lemma surface deformation. Conclusions The cleistogamic and chasmogamic wheat cultivars differ significantly in the potential for pollen dispersion for cross-pollination, which is mainly related to anther extrusion capacity. Although none of these features differentiated the cultivars clearly, we assume, based on spikelet kinetics and the lack of lemmas surface deformation, that the water transport and turgor of cells is essential for the floret opening and anther extrusion in wheat. The search for parental ideotype should be supported by marker assisted selection, e.g. based of polymorphisms in genes related to aquaporin biosynthesis. |
| Databáze: | OpenAIRE |
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