Determination of endogenous hormones, sugars and mineral nutrition levels during the induction, initiation and differentiation stage and their effects on flower formation in olive

Ülger, Salih; Sönmez, Sahriye; Karkacıer, Mustafa; Ertoy, Nisa; Akdeşir, Özgür; Aksu, Mehmet

doi:10.1023/b:grow.0000014897.22172.7d

Cited by 88 publications

(68 citation statements)

References 18 publications

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“…Increased in yield was shown in "Manzanilo" olive cultivar (16), in almond (9), grape (24) with foliar spray of both zinc sulphate and urea. Ulger et al (29) who concluded that nutrients may have limited effect on floral formation. The major effect of olive tree nutritional status on productivity was found to be through the process of fruit setting.…”

Section: Resultsmentioning

confidence: 99%

Study On Foliar Application Nitrogen, Boron And Zinc On Olive Tree

Sayyad-Amin¹,

Shahsavar²,

Aslmoshtaghi³

2015

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Section: Resultsmentioning

confidence: 99%

Study On Foliar Application Nitrogen, Boron And Zinc On Olive Tree

Sayyad-Amin¹,

Shahsavar²,

Aslmoshtaghi³

2015

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“…Moreover, trehalose-6-P has been considered as a flowering signal (Paul et al, 2008). Carbohydrates may not have a direct effect to induce floral initiation (Ulger et al, 2004). Further studies should be conducted to reveal the active mechanism of sugar in floral transition.…”

Section: Relationship Between the Changes In Sugars And Respiration Rmentioning

confidence: 99%

Morphological and Physiological Changes in <i>Sedum spectabile </i>during Flower Formation Induced by Photoperiod

YANG

WANG

QIN

et al. 2015

Not Bot Hort Agrobot Cluj

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Sedum spectabile is an ornamental herbaceous perennial considered as a long-day plant. Varying levels of hormones and sugars possibly affect flower bud formation. This study aimed to determine the changes in endogenous hormones, sugars, and respiration levels in leaves and in apical buds. In addition, the current research was also conducted to observe the morphological changes during the induction, initiation and development of flower buds. Results showed that the periods of floral induction, initiation and development of S. spectabile were the period from 0 d to 1 d, 2 d to 10 d and after 11 d respectively under long day of 20 hours. High zeatin level in apical buds was conducive to floral induction; the increasing levels of gibberrelin and indole acetic acid favor floral initiation; floral development was regulated by mutually synergistic and antagonistic relationships of hormones. The total starch content in leaves remarkably decreased during floral induction. Moreover, soluble sugar content increased and reached the maximum level at 20 d of the treatment period. Afterward, soluble sugar content declined rapidly and was probably transported to the apical buds for rapid floral development. Furthermore, the total respiration of leaves maintained an upward trend; the cytochrome pathway also maintained an increasing trend after the plants were treated for 20 d. Such changes may favour the morphological differentiation of apical buds in floral development.

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“…Ulger et al (2004) observed that the abscisic acid (ABA), indole-3-acetic acid (IAA), and gibberellic acid (GA4) levels in leaves, nodes and fruits of olive (Olea europea L.) during the induction, initiation, and differentiation periods in the on year were lower than those in the off year. Similarly, Pal & Ram (1978) in mango (Mangifera indica L.), Ulger et al (1999) in olive, and Chen (1990) in litchi (Litchi chinensis Sonn.…”

Section: Physiology Of Dormancymentioning

confidence: 99%

“…An increase in zeatin levels during the induction period in the off year suggests that had possibly a positive effect on floral formation (Chen, 1987(Chen, , 1990Mullins & Rajasekaran, 1981;Ramirez & Hoad, 1981;Ulger et al, 2004). Many experiments confirmed the direct involvement of different growth regulators in promoting or inhibiting flower bud induction and differentiation.…”

Section: Physiology Of Dormancymentioning

confidence: 99%

“…However, all these studies were related to the effect of a single regulator or its quantitative changes before, during or after flower bud induction (Lavee, 1989). On contrary to plant growth regulators, Ulger et al (2004) suggested that carbohydrates and mineral nutrients might not have a direct effect to induce flower initiation.…”

Section: Physiology Of Dormancymentioning

confidence: 99%

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