Hormonal regulation of fruit set, parthenogenesis induction and fruit expansion in Japanese pear

Zhang, Caixi; Lee, Ugyong; Tanabe, Kenji

doi:10.1007/s10725-008-9279-2

Cited by 41 publications

(36 citation statements)

References 35 publications

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“…Nakamura, T. Moriguchi and I. Nakajima early non-13-hydroxylated GAs such as GA 4 and GA 7 (Ito et al, 1999), whereas other bioactive forms of early 13-hydroxylated GA 1 /GA 3 have no effect on fruit size (Nakagawa et al, 1979;Zhang et al, 2008), a finding that is in accordance with our result. Zhang et al (2008) applied GA 1 , GA 3 , GA 4 , and GA 7 to Japanese pear fruit, and reported that their effectiveness for fruit enlargement is GA 4 ≈ GA 7 > GA 3 > GA 1 . Nakagawa et al (1979) showed that GA 4 is more abundant than GA 7 in pear fruit; therefore, we hypothesized in this study that the positive effect of GA 4+7 treatment on fruit enlargement (if any) would be due to GA 4 and not GA 7 .…”

supporting

confidence: 92%

“…Ito, D. Sakamoto, A. Itai, T. Nishijima, N. Oyama-Okubo, Y. Nakamura, T. Moriguchi and I. Nakajima early non-13-hydroxylated GAs such as GA 4 and GA 7 (Ito et al, 1999), whereas other bioactive forms of early 13-hydroxylated GA 1 /GA 3 have no effect on fruit size (Nakagawa et al, 1979;Zhang et al, 2008), a finding that is in accordance with our result. Zhang et al (2008) applied GA 1 , GA 3 , GA 4 , and GA 7 to Japanese pear fruit, and reported that their effectiveness for fruit enlargement is GA 4 ≈ GA 7 > GA 3 > GA 1 .…”

supporting

confidence: 91%

“…Considering that the bioactive form of GA in Japanese pears is GA 4 (Zhang et al, 2008), we hypothesized that GA 4 at a concentration of ≈ 0.27% in the GA 3+4 treatment (i.e., 1/10 of 2.7% GA 3+4 paste) may be insufficient to enlarge 'Kosui' fruit, but sufficient for 'Hosui', whereas GA 4+7 at a concentration of 2.7% may be necessary for 'Kosui' enlargement. To re-confirm the effective GA 4+7 concentration in 'Kosui', we applied 1/10 GA 4+7 either alone or in combination with PCa in 2009.…”

Section: Effect Of 1/10 Ga 4+7 and Pca On Fruit Size Of 'Kosui'mentioning

confidence: 99%

“…We have already reported that a combination treatment of GA paste (GA 3+4 ) and PCa can increase the fruit size of Japanese pear 'Hosui' compared with applying GA paste alone , and is accompanied with a higher level of GA 4 , the bioactive form of GA in Japanese pears (Ito et al, 2000;Nakagawa et al, 1979;Zhang et al, 2007Zhang et al, , 2008, in the treated fruit. However, in practice, 'Hosui' growers may experience some difficulty in using GA paste for fruit enlargement because 'Hosui' is a cultivar susceptible to "water core", a disorder known to be aggravated by GA application (Chun et al, 2003;Sakuma et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

“…Ito, D. Sakamoto, A. Itai, T. Nishijima, N. Oyama-Okubo, Y. Nakamura, T. Moriguchi and I. Nakajima molecules have equal effects on fruit enlargement in Japanese pears (Zhang et al, 2008). GA 3+4 and GA 4+7 were applied to fruit pedicels alone or in combination with PCa.…”

mentioning

confidence: 99%

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Effects of GA3+4 and GA4+7 Application Either Alone or Combined with Prohexadione-Ca on Fruit Development of Japanese Pear ‘Kosui’

et al. 2016

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In order to promote increases in the size of 'Kosui' Japanese pear [Pyrus pyrifolia (Burm.) Nakai] fruit by plant growth regulators, we applied gibberellin (GA) 3+4 paste [2.7% (w/w), A 3 :A 4 = 90:10] in combination with prohexadione-calcium [1%, PCa; BAS-125 (3-oxido-4-propionyl-5-oxo-3-cyclohexene-carboxylate)], an inhibitor of GA 2β-hydroxylation that catabolizes active GA into an inactive form, to fruit pedicels at approximately 30 days after full bloom. GA 3+4 +PCa treatment advanced fruit growth only in the early stages, but fruit weight did not show any significant differences between the untreated control and GA 3+4 +PCa-treated fruits at harvest. In contrast, when GA 4+7 [2.7% (w/w), A 4 :A 7 = 66:34] was applied, the fruit weight at harvest was greater than that of untreated fruit. Moreover, GA 4+7 treatment in combination with PCa resulted in an even higher fruit weight at harvest. The GA 4 concentration in fruit flesh was not affected by GA 3+4 application at 1 week after the treatment (WAT) either with or without PCa, but GA 4 levels increased with GA 4+7 +PCa treatment, resulting in a significant increase in fruit weight at harvest. A single GA 4+7 application almost doubled the GA 4 concentration compared with the untreated control, but the difference was not significant. These results indicate that fruit weight at harvest was greater when the GA 4 concentration was higher in the fruit flesh at 1 WAT. The higher concentration of GA 4 in the GA 4+7 +PCa-treated fruit compared with the GA 4+7 treatment alone may be attributed to the function of PCa that acts to prevent the inactivation of GA 4 to GA 34 by inhibiting 2β-hydroxylation.

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supporting

confidence: 92%

supporting

confidence: 91%

Section: Effect Of 1/10 Ga 4+7 and Pca On Fruit Size Of 'Kosui'mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effects of GA3+4 and GA4+7 Application Either Alone or Combined with Prohexadione-Ca on Fruit Development of Japanese Pear ‘Kosui’

et al. 2016

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Flying Doctors for a Better Quality in Fruit Production

Pozo

Vendeville

Mommaerts

et al. 2020

Entomovectoring for Precision Biocontrol and Enhanced Pollination of Crops

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Mechanisms Involved in Calcium Deficiency Development in Tomato Fruit in Response to Gibberellins

Freitas

Jiang

Mitcham

2011

J Plant Growth Regul

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Although gibberellins (GAs) have been shown to induce development of the physiological disorder blossom-end rot (BER) in tomato fruit (Solanum lycopersicum), the mechanisms involved remain largely unexplored. BER is believed to result from calcium (Ca) deficiency, but the relationship between Ca content and BER incidence is not strong. Our objectives were to better understand how GAs and a GA biosynthesis inhibitor affect BER development in tomato fruit. Tomato plants of two BER-susceptible cultivars, 'Ace 55 (Vf)' and 'AB2,' were grown in a greenhouse environment and subjected to Ca-deficiency conditions. Plants were treated weekly during fruit growth and development with 300 mg L -1 GA 4?7 , 300 mg L -1 prohexadione-calcium (Apogee Ò , a GA biosynthesis inhibitor), or water beginning 1 day after flower pollination. GA 4?7 treatment induced an increase in BER incidence in both cultivars up to 100%, whereas 'Ace 55 (Vf)' and 'AB2' plants treated with Apogee did not show BER incidence. The number of functional xylem vessels was higher in the placental and pericarp tissue of tomato fruit treated with Apogee at the early stages of fruit growth. Treatment with Apogee also increased fruit pericarp Ca concentration. GA 4?7 treatment enhanced the expression of the putative CAX and Ca-ATPase genes, that code for proteins involved in Ca movement into storage organelles. The lowest watersoluble apoplastic Ca concentration and the highest membrane leakage values were observed in the pericarp of GA 4?7 -treated fruit. These results suggest that GAs consistently reduced fruit Ca uptake and water-soluble apoplastic Ca concentration, leading to leakier plasma membranes and an increase in BER development in fruit tissue of both tomato cultivars.

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Hormonal regulation of fruit set, parthenogenesis induction and fruit expansion in Japanese pear

Abstract: The

Cited by 41 publications

References 35 publications

Effects of GA<sub>3+4</sub> and GA<sub>4+7</sub> Application Either Alone or Combined with Prohexadione-Ca on Fruit Development of Japanese Pear ‘Kosui’

Effects of GA<sub>3+4</sub> and GA<sub>4+7</sub> Application Either Alone or Combined with Prohexadione-Ca on Fruit Development of Japanese Pear ‘Kosui’

Flying Doctors for a Better Quality in Fruit Production

Mechanisms Involved in Calcium Deficiency Development in Tomato Fruit in Response to Gibberellins

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