Forage potential of Urochloa genotypes by using leaf anatomy
| Autor: | Fabricio José Pereira, Gabrielle Avelar Silva, Janaína Mauri, Daniele Laís Pereira, Lisete Chamma Davide, Fausto Souza Sobrinho, Vânia Helena Techio |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lignin
Plant anatomy lcsh:Agriculture chemistry.chemical_compound Parenchyma Urochloa Cultivar forragicultura lcsh:Agriculture (General) digestibilidade sclerenchyma General Veterinary biology anatomia foliar fungi forage production 0402 animal and dairy science lcsh:S Xylem food and beverages 04 agricultural and veterinary sciences biology.organism_classification Vascular bundle 040201 dairy & animal science lcsh:S1-972 esclerênquima lignina Horticulture chemistry digestibility Chlorophyll 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Animal Science and Zoology leaf anatomy Phloem Agronomy and Crop Science |
| Zdroj: | Ciência Rural v.49 n.4 2019 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM Ciência Rural, Vol 49, Iss 4 (2019) |
| Popis: | The digestibility potential of leaves from forages depends on the amount of nutrition in their tissues, with low lignin deposition in the cell wall, mainly parenchyma and phloem. This research evaluated the leaf structure of different Urochloa genotypes and discussed its potential for evaluating digestibility. The cultivars U. brizantha, U. decumbens, U. ruziziensis and three clones of U. ruziziensis (1, 95 and 97), which are under development in breeding programs, were evaluated. Plants were grown under the recommended culture conditions for the Urochloa species. Plants were cut 60 days after sowing, and leaves were collected at 15 days of regrowth. Leaves were fixed in FAA 70 and further stored in 70% ethanol until being submitted to the usual microtechniques for the preparation of microscopy slides. The area of the tissues from the interveinal and midrib regions was measured using ImageJ software, and their proportions were calculated. In the interveinal region, the proportion of chlorophyll parenchyma was greater for U. decumbens and the Clone 1 genotypes. Urochloa brizantha and clones 95 and 97 showed a higher proportion of the vascular bundle compared to U. ruziziensis, U. decumbens and Clone 1. The proportion of the ground parenchyma in the midrib was greater in U. brizantha, Clone 95 and Clone 97. Thus, it can be concluded that the Clone 1 genotypes (from U. ruziziensis) showed leaf tissues (parenchyma and phloem) with higher digestibility potential; in addition, U. brizantha and U. decumbens showed a high percentage of xylem and sclerenchyma, which reduces their quality as forage. |
| Databáze: | OpenAIRE |
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