Promotive Effects of Exogenous and Endogenous Gibberellins on the Fruit Development in Cucumis sativus L.

Ogawa, Yukiyoshi; Inoue, Noboru; Aoki, Shohei

doi:10.2503/jjshs.58.327

Cited by 7 publications

(9 citation statements)

References 6 publications

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“…However, the application of IAA and GA 3 to a parthenocarpic cultivar led to the inhibition of fruit growth at the middle and upper nodes in our study. Conversely, Shimizu (1967), Ogawa et al (1989), and Hayashi et al (1970) found that the IAA and GA 3 treatments of a single fruit per plant induced parthenocarpic fruit growth in non-parthenocarpic cultivars.…”

Section: Discussionmentioning

confidence: 99%

“…Fruit were weighed, frozen in liquid nitrogen, and then the concentrations of trans-zeatin (Z), trans-zeatin riboside (ZR), isopentenyladenine (iP), isopentenyladenosine (iPR), and IAA were determined. These hormones are active forms of auxin and cytokinin that function as primary inducers of fruit growth in cucumber plants (Kim et al, 1992;Ogawa et al, 1989Ogawa et al, , 1990. The extraction and purification of hormones were performed as described by Yu et al (2001) and Ito et al (1999), with some modifications (Boonkorkaew et al, 2008).…”

Section: Endogenous Hormone Analysismentioning

confidence: 99%

“…Although the application of PGRs to parthenocarpic fruit growth has been studied and transcriptional hormone analyses have been conducted (Li et al, 2014), there have been few studies (Ogawa et al, 1989(Ogawa et al, , 1990 quantifying the concentration of endogenous plant hormones after PGR application. Ogawa et al (1989Ogawa et al ( , 1990) studied the effects of PGR application using a paper chromatographic bioassay to measure endogenous gibberellins and cytokinins in fruit of nonparthenocarpic cucumber cultivars.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, indole-3-acetic acid (IAA) (Hayashi et al, 1970), 2,3,5-triiodobenzoic acid (TIBA) (Hamamoto et al, 1998;Kim et al, 1992), benzyl adenine (BA) (Shishido et al, 1990), N-(2-chloro-4-pyridyl)-N′-phenylurea (CPPU) (Li et al, 2014), and gibberellic acid (GA 3 ) (Ogawa et al, 1989;Shimizu, 1967) have been reported to induce parthenocarpic fruit growth in cucumbers and tomatoes. However, these studies applied PGRs to only one fruit per plant.…”

Section: Introductionmentioning

confidence: 99%

“…Ogawa et al (1989Ogawa et al ( , 1990) studied the effects of PGR application using a paper chromatographic bioassay to measure endogenous gibberellins and cytokinins in fruit of nonparthenocarpic cucumber cultivars.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Exogenous Plant Growth Regulators on Yield, Fruit Growth, and Concentration of Endogenous Hormones in Gynoecious Parthenocarpic Cucumber (<i>Cucumis sativus</i> L.)

Hikosaka

Sugiyama

2015

The Hortic J

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It has been reported that parthenocarpic cucumbers with many female flowers and heavy fruit load often show fruit abortion and reduced fruit yield. To achieve the stable fruit production, it is necessary to elucidate the mechanism involved in fruit abortion in cucumbers via fruit load and endogenous plant hormones. In Exp. 1, the effects of exogenous plant growth regulators (PGRs) on yield and fruit growth were examined in a gynoecious, parthenocarpic cucumber (Cucumis sativus L.). Four types of PGR [indole-3-acetic acid (IAA), 2,3,5-triiodobenzoic acid (TIBA), benzyl adenine (BA), and gibberellic acid (GA 3 )], which have been shown to enhance fruit growth in non-parthenocarpic cucumbers, were applied using lanolin paste to the peduncles at each node (6-25) of cucumber plants at anthesis. TIBA and BA applications significantly decreased the rate of fruit abortion, thereby increasing yield. IAA and GA 3 treatments increased the rate of fruit abortion at the middle and upper nodes, thereby reducing fruit yield. In Exp. 2, to clarify whether PGRs affected the concentrations of endogenous plant hormones, and whether IAA of high concentration increased fruit abortion under low-fruit-load conditions, we applied these PGRs (two concentrations of IAA, BA, and TIBA) to cucumber plants bearing only one fruit at node 11 or 12. No fruit abortion occurred following any PGR or control treatment, although both IAA and BA treatments inhibited fruit growth. BA application increased the production of cytokinins (Z, ZR, iP, and iPR) to a level similar to that after TIBA application one day after anthesis. However, compared with the response to TIBA treatment, after BA treatment, the peak in endogenous cytokinin production occurred at an earlier stage of fruit development. Additionally, both IAA and TIBA treatments increased endogenous IAA and cytokinin concentrations in fruit. These results suggest that exogenous PGRs affect the overall concentration of PGRs, as well as that of other endogenous plant hormones. However, PGRs may not be associated with fruit abortion when the fruit load is low. In conclusion, fruit load may have a greater influence on fruit abortion than that of PGRs.

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Section: Discussionmentioning

confidence: 99%