Salinity tolerance of high fescue, naturalized and commercial, free and infected with endophytes during germination
An experiment was carried out in a germination chamber with the objective of comparing the salinity tolerance in different materials of tall fescue (Schedonorus arundinaceus) free and infected with endophyte Epichloë coenophialaduring germination. A randomized complete block design with three replicates in time with factorial arrangement was used. The experimental factors were: 1) genetic material of tall fescue, four levels: a naturalized population free (S-) and infected (S+) with wild endophyte and cv. Taita free (T-) and infected (T+) with endophyte AR584, and 2) saline condition, three levels: 0 (control), 40 and 80 mM NaCl. Seeds were placed in rolls of paper soaked in the appropriate saline solution, and the following variables associated with germination were evaluated: germination energy (EG), germination power (PG), coleoptile (LC) and radicle length (LR), fresh weight (PF) and dry weight (PS) of seedlings. There was no interaction between the experimental factors for any of the variables (p>0.05). As salinity increased, PG decreased in all evaluated materials, while EG and LC only decreased under 40 and 80 mM NaCl, respectively. All tall fescue materials presented similar values of EG, LC, LR and PF. However, S+ showed the highest PG, which did not differ from that of S-. Seedlings of T+ registered the lowest PS. The results obtained indicate no differences in salinity tolerance among the tall fescue materials studied.
| Main Authors: | , , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata
2022
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| Online Access: | https://revistas.unlp.edu.ar/revagro/article/view/14069 |
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