Journal
SCIENTIA HORTICULTURAE
Volume 288, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2021.110389
Keywords
Phoenix dactylifera L; Metaxenia effect; Auxin; Cytokinin; Gibberellin; Abscisic acid
Categories
Funding
- Shiraz University
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The study found that pollen grains of different date palm pollinators contain varying amounts of hormones, with 'Fard' and 'Sheikhali' cultivars having higher levels. The amount of hormones in the fruit at different growth stages varied significantly, with trees pollinated by 'Fard' and 'Sheikhali' cultivars showing the highest hormone levels. The positive correlation between pollen grains hormones and fruit growth hormones confirms the impact of metaxenia on the characteristics of 'Piarom' date fruits, leading to an improvement in both quantity and quality.
The aim of this study was to investigate the metaxenia effect of pollen grain hormones of date palm pollinators on the hormones of different stages of fruit growth. The relationships between auxin, cytokinin, gibberellin and abscisic acid hormones of 'Shahani', 'Kabkab', 'Zahedi', 'Beraem', 'Faryab', 'Sheikhali', 'Fard' and 'Jarvis' pollen grains with the amount of the same hormones in different stages of 'Piarom' fruit development were studied. The results showed that pollen grains of different date palm pollinators have different amounts of these hormones. Pollen grains of 'Fard' and 'Sheikhali' cultivars have higher amounts of hormones compared to other cultivars. The amount of these hormones was also very variable at different stages of fruit growth. The highest amount of hormones in different stages of 'Piarom' date fruit growth was observed in trees that were pollinated with pollen grains of 'Fard' and 'Sheikhali' cultivars. Also the amount of these hormones in pollen grains and different stages of fruit growth had a positive linear relationship. The positive correlation between pollen grains hormones and hormones of different stages of fruit growth confirms the metaxenia effect of pollen grains on the characteristics of 'Piarom' date fruit. The presence of more hormones in the fruit, which is directly related to the amount of these hormones in pollen grains, improves the quantity and quality of date palm fruits.
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