Red drupelet reversion in blackberries: A complex of genetic and environmental factors

Edgley, Max; Close, DC; Measham, Penelope

doi:10.1016/j.scienta.2020.109555

Cited by 20 publications

(20 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…From our observations, the reduction in RDR incidence and the longer shelf life of the blackberries treated with SA of 3 mM and COS of 0.25% could be attributed mainly to the PAL enzyme activation and the decrease in PG activity. Also, studies are reporting that blackberry handling largely increases the possibility of developing physiological disorders compared with not handled fruit (Edgley et al, 2020). Therefore, to preserve blackberry integrity and shelf life, minimal handling is desired.…”

Section: Discussionmentioning

confidence: 99%

Delayed Senescence and Marketability Index Preservation of Blackberry Fruit by Preharvest Application of Chitosan and Salicylic Acid

et al. 2022

View full text Add to dashboard Cite

Blackberry fruits are appreciated as a source of nutrients and compounds related to benefit human health. However, they are highly perishable and very susceptible to decay factors. Current methods to improve and maintain blackberry quality are limited in use because of the fruit's fragile physical properties. Regarding these properties, it has been reported that the activities of certain enzymes are linked to senescence and fruit softening processes. This study was aimed to assess the effect of salicylic acid (SA) and chitosan (COS) as preharvest treatments on the physiology related to improving fruit conservation and preserving the marketability index of blackberry fruit. The preharvest treatments were foliar sprayed on blackberry plants at different concentrations. The activities of enzymes superoxide dismutase (SOD), catalase (CAT), phenylalanine ammonia-lyase (PAL), and polygalacturonase (PG) were measured. Total soluble solids (TSS), titratable acidity (TA), TSS/TA ratio, and marketability index (MI) were analyzed after 144 h of storage. The application of 3 mM of SA and 0.25% of COS treatments preserved the MI of blackberries by reducing leakage, red drupelet reversion (RDR), and mycelium presence in the fruit. SA application increased SOD, CAT, and PAL activities. Our results also showed that SA and COS preharvest treatments modified the activity of the cell wall degrading enzyme PG, which might play a role in improving the shelf life and resistance to decay factors of blackberry fruit without any significant effects on physicochemical properties like TSS, TA, and the TSS/TA ratio.

show abstract

Section: Discussionmentioning

confidence: 99%

Delayed Senescence and Marketability Index Preservation of Blackberry Fruit by Preharvest Application of Chitosan and Salicylic Acid

et al. 2022

View full text Add to dashboard Cite

show abstract

“…It has been speculated that RDR is caused by intracellular damage to the cell wall and vacuolar membranes that causes contents of the vacuole to spill out into the cytoplasm (Edgley et al, 2020). Tissue within reverted drupelets typically has larger intercellular spaces and ruptured cells indicative of widespread damage to the upper mesocarp (Salgado and Clark, 2016a).…”

mentioning

confidence: 99%

“…Edgley et al (2019a) also used electrolytic leakage to measure damage to the plasma membrane of fruit tissue with significant increases from fully black drupelets (64.9%) to partially red (84.8%) and fully red drupelets (90.0%). The anthocyanins that are longer sequestered in the vacuole in damaged drupelets are susceptible to degradation, though different structural features of particular anthocyanins may affect their susceptibility to degradation (Edgley et al, 2019a(Edgley et al, , 2020.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Effect of Harvest Time and Fruit Firmness on Red Drupelet Reversion in Blackberry

Armour¹,

Worthington²,

Clark³

et al. 2021

horts

View full text Add to dashboard Cite

Red drupelet reversion (RDR) is a postharvest disorder of blackberries (Rubus L. subgenus Rubus Watson) in which fully black drupelets revert to red after harvest. This disorder can negatively impact consumer perception of fresh-market blackberries. The cause of RDR is hypothesized to be related to intracellular damage sustained because of mechanical and environmental stress during and after harvest. Cultivars differ in susceptibility to this disorder; and cultural factors, including nitrogen rate, harvest and shipping practices, and climate during harvest, influence RDR severity. In this 2-year study, seven genotypes (cultivars and advanced selections) developed in the University of Arkansas System Division of Agriculture (UA) blackberry breeding program, with a range of fruit textures, were evaluated to determine whether firmness was correlated with RDR. In addition, fruit was harvested at four different times (7:00 am, 10:00 am, 1:00 pm, and 4:00 pm) to investigate whether harvest time influences RDR. All seven genotypes were harvested at the four times on two harvest dates per year and evaluated for RDR and firmness after 1 week of cold storage (5 °C). Fruit harvested early in the day had less RDR, with 7:00 am harvests having the least RDR in both years. Significant genotypic differences in RDR and fruit firmness were found in each year. Firmness was negatively correlated with RDR in 2018 and 2019. These results indicate that growers may be able to reduce the prevalence of RDR by choosing cultivars with firm fruit texture and harvesting early in the day.

show abstract

“…Overall, it is likely that multiple environmental factors are involved in creating white drupelets in blackberries and assigning cause and effect to one is difficult. This is also true in the case of other blackberry fruit disorders such as red drupelet reversion (Edgley et al, 2020). WDD expresses several stress response genes differentially (Fernandez et al, 2019), but more work is needed to narrow down the specific roles these genes play.…”

Section: Resultsmentioning

confidence: 99%

Additional Nitrogen Application Reduced White Drupelet Disorder in ‘Sweetie Pie’ Blackberry

Stafne

Bibb

Smith

2021

hortte

View full text Add to dashboard Cite

White drupelet disorder (WDD) in blackberry (Rubus subgenus Rubus) is an abiotic condition resulting from a cultivar and environment interaction. Although high temperatures and light intensities have been implicated, little is known why this disorder manifests. Other factors, such as overall plant stress, may be contributing influences. In this study, three treatments were applied to examine whether the addition of nitrogen (N) can reduce WDD on ‘Sweetie Pie’ erect blackberry over three seasons. An initial 50 lb/acre (56.0 kg⋅ha–1) N was applied to all plots at budbreak. Two additional N application treatments of 100 kg⋅ha–1 were applied at one time (1×) or five, 20-kg⋅ha–1 applications (5×), spaced 1 week apart for 5 weeks starting at bloom. One control treatment of no additional N (0×) was also included. Berries were harvested and weighed as a total, then berries with white drupelets were separated out and weighed. The two values were divided to create a proportion and were then multiplied by 100 to determine the percentage. Nitrogen application decreased the percentage of white drupelet berries from 13.0% (control) to 10.0% (one additional application) and 9.1% (five additional applications). WDD for the 0× treatment correlated negatively to maximum high daytime temperatures during May (r = –0.58, P = 0.03) over the three seasons. Occurrence of white drupelets by treatments 0×, 1×, and 5× correlated significantly with the cumulative number of rainfall events (r = 0.49, 0.47, and 0.46, respectively). Leaf chlorophyll index and photosynthesis measurements were unaffected by treatment. Although it is likely that multiple factors are involved in the development of white drupelets, additional N may reduce the problem.

show abstract

Red drupelet reversion in blackberries: A complex of genetic and environmental factors

Cited by 20 publications

References 62 publications

Delayed Senescence and Marketability Index Preservation of Blackberry Fruit by Preharvest Application of Chitosan and Salicylic Acid

Delayed Senescence and Marketability Index Preservation of Blackberry Fruit by Preharvest Application of Chitosan and Salicylic Acid

Effect of Harvest Time and Fruit Firmness on Red Drupelet Reversion in Blackberry

Additional Nitrogen Application Reduced White Drupelet Disorder in ‘Sweetie Pie’ Blackberry

Contact Info

Product

Resources

About