scholarly journals LOW GIBBERELLIN ENHANCED SWEETPOTATO PLANT PRODUCTION

HortScience ◽  
1992 ◽  
Vol 27 (11) ◽  
pp. 1176d-1176
Author(s):  
Melvin R. Hall
Keyword(s):  
Gibberellic Acid ◽  
Ipomoea Batatas ◽  
Plant Production ◽  
Root Yield ◽  
Storage Roots ◽  
Benzyl Adenine ◽  
Visual Appearance ◽  
Low Concentration ◽  
Total Plant

Immersion of sweetpotato [Ipomoea batatas (L.)] storage roots in low concentration (5 and 50 mg·liter-1) of gibberellic acid (GA) in solutions of benzyl adenine plus GA4+7 increased early but not total plant production from bedded roots of `Georgia Jet' and `Jewel'. Immersion in 0.5 and 1 mg·liter-1 solutions of GA3 increased early plant production from `Georgia Jet'. Neither weight nor visual appearance of the harvested plants nor root yield from transplants were influenced by gibberellin treatments of the bedded roots.

scholarly journals Midstorage Heating. Increased Plant Production from Bedded Sweetpotato Roots

HortScience ◽  
1993 ◽  
Vol 28 (8) ◽  
pp. 780-781 ◽  
Author(s):  
Melvin R. Hall
Keyword(s):  
Relative Humidity ◽  
Ipomoea Batatas ◽  
Plant Production ◽  
Cumulative Number ◽  
Storage Roots ◽  
Quadratic Response ◽  
Total Plant ◽  
Plant Emergence ◽  
Heating Duration

`Red Jewel' sweetpotato [Ipomoea batatas (L.)] roots were cured [32 ± 1C, 85% ± 5% relative humidity (RH)] for 7 days immediately after harvest and cured for O. or 8 additional days before being stored (16 ± 1C, 85% ± 5% RH). Midway through storage, roots were heated (32 ± 1C, 85% ± 5% RH) for 0, 2, 4, 6, 8, 10, 12, or 14 days and placed back into storage. Before being bedded, roots were presprouted (32 ± 1C, 85% ± 5% RH) for O or 8 days. Plant emergence was accelerated with extended curing or presprouting and with increased midstorage heating duration. Early plant production increased with increasing duration of midstorage heating of roots not subjected to extended curing or presprouting. Eight days of extended curing eliminated response to midstorage heating; but, with 8 days of presprouting, a quadratic response to midstorage heating peaked at ≈ 8 days. However, when combined with midstorage heating, presprouting had more of an effect than extended curing on early plant production. Briefly extending curing, midstorage heating, and presprouting each independently increased the cumulative number of midseason plants, but only presprouting influenced total plant production. Treatments did not influence deterioration of bedded roots or number of sprouts <20 cm produced during 10 weeks of harvest.

scholarly journals Modeling the impact of sweetpotato weevils on storage root yield

2018 ◽  
Vol 3 (1) ◽  
pp. 319-325
Author(s):  
Daniel A. Akansake ◽  
Putri E. Abidin ◽  
E. E. Carey
Keyword(s):  
Ipomoea Batatas ◽  
Soft Rot ◽  
Northern Ghana ◽  
Root Yield ◽  
Storage Roots ◽  
Yield Data ◽  
Level Of Significance ◽  
Attainable Yield ◽  
The Impact ◽  
Model Approach

Abstract This study estimated the amount of loss in storage roots caused by various levels of damage caused by sweetpotato weevils (Cylas spp). Seven varieties of sweetpotato (Ipomoea batatas L. (Lam)) were evaluated in three production sites in northern Ghana for two years (2014 and 2015). Yield data for each experimental plot were collected. A regression analysis was carried out using the generalized linear model approach. In the study, nonmarketable roots were classified as all undersized roots (<100g) and spoilt roots due to weevil, millipede, and soft rot. The results indicated weevil damage as the only significant predictor of nonmarketable yield at 5% level of significance. From the study, the average values for total root yield, marketable root yield, and nonmarketable root yield were 9.39, 6.71, and 2.67 ton/ha respectively. The minimum weevil damage (score 2) resulted in a yield loss of 2 ton/ha which represents 8.3% while severe damage at score 9 could cause a loss of 7.43 ton/ha of storage roots representing 31% of the attainable yield of sweetpotato. Weevil susceptibility needs to be treated as a serious trait when evaluating sweetpotato genotypes to be released as varieties.

scholarly journals Cultivar decline in sweetpotato (Ipomoea batatas)

2011 ◽  
Vol 64 ◽  
pp. 160-167 ◽  
Author(s):  
S.L. Lewthwaite ◽  
P.J. Fletcher ◽  
J.D. Fletcher ◽  
C.M. Triggs
Keyword(s):  
New Zealand ◽  
Virus Infection ◽  
Ipomoea Batatas ◽  
Storage Root ◽  
Spontaneous Mutations ◽  
Production Environment ◽  
Root Yield ◽  
Storage Roots ◽  
Field Exposure ◽  
Growing Seasons

The sweetpotato (Ipomoea batatas) crop is propagated vegetatively by field transplanting adventitious sprouts produced on storage roots retained from the previous seasons harvest This system promotes the persistence and accumulation of both viruses and spontaneous mutations A phenomenon known as cultivar decline has been reported internationally where the root yield and appearance of commercially grown sweetpotato cultivars appear to deteriorate over successive growing seasons The relative contributions of virus infection and plant mutation to cultivar decline are uncertain but both issues are addressed through the use of virustested tissue cultured propagation systems This study assessed the degree of decline for cultivars Owairaka Red and Beauregard within the New Zealand biophysical production environment Storage root yield decreased significantly with increasing field exposure for both cultivars (P

scholarly journals Effect of planting methods on growth and yield of sweet potato (Ipomoea batatas L.) varieties at Luyengo, midlevel of Eswatini

2021 ◽  
Vol 11 (1) ◽  
pp. 013-021
Author(s):  
Sakhile Sipho Dlamini ◽  
Mzwandile Petros Mabuza ◽  
Bonginkhosi Edward Dlamini
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Growth And Yield ◽  
Storage Root ◽  
Root Yield ◽  
Storage Roots ◽  
Potato Varieties ◽  
Planting Methods ◽  
Method Of Planting ◽  
Planting Method

Sweet potato (Ipomoea batatas L.) is the most grown storage root crop in Eswatini. However, its storage root yield is low among smallholder farmers partly due to use of inappropriate varieties and agronomic practices such as planting method. Thus, a field experiment was conducted at the University of Eswatini, Faculty of Agriculture, Luyengo, during 2019/2020 cropping season to determine the effects of planting method on growth and yield of the three sweet potato varieties. Two planting methods, namely horizontal and vertical; and three sweet potato varieties, namely Kenya-white, Ligwalagwala and Lamngititi were evaluated in a factorial arrangement in randomized complete block design in three replications. Results showed non-significant difference between the planting methods in most growth and yield parameters recorded for the sweet potato varieties. However, the vertical method of planting had relatively higher vine length, number of branches, mass of storage roots and storage root yield than the horizontal method. On the other hand, there were significant (P<0.05) differences among the sweet potato varieties for most of parameters recorded. The sweet potato variety Ligwalagwala had the highest vine length, number of storage roots per plant (6.47), mass of storage roots per plant (1137 g) and storage root yield (12.01 tonnes/ha). Thus, either horizontal or vertical method of planting and variety Ligwalagwala can be used to increase the productivity of sweet potato in the study area.

scholarly journals The assessment of yield and quality traits of sweet potato (Ipomoea batatas L.) genotypes in middle Black Sea region, Turkey

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257703
Author(s):  
Yasin Bedrettin Karan ◽  
Özlem Gültekin Şanli
Keyword(s):  
Sweet Potato ◽  
Black Sea ◽  
Ipomoea Batatas ◽  
Dry Matter ◽  
Quality Traits ◽  
Storage Root ◽  
Root Yield ◽  
Storage Roots ◽  
Yield And Quality ◽  
Second Year

Sweet potato (Ipomoea batatas L.) cultivation in Turkey is concentrated in one province situated in Mediterranean region only, which would not fulfill the domestic needs of the country soon. Therefore, cultivation of the crop in other provinces/climatic regions should be initiated to fulfill the domestic needs. The cultivation in other provinces requires thorough assessment of yield and quality traits of target crop. Therefore, yield and quality characteristics of four sweet potato genotypes (i.e., ‘Hatay Kırmızısı’, ‘Hatay Yerlisi’, ‘Havuc’ and ‘Kalem’) were assessed in the current study in Kazova and Niksar counties of Tokat province of the country having middle Black Sea climate in field experiments during 2018 and 2019. The cuttings of the genotypes were planted in Niksar during the second fortnight of April and first week of May in Kazova. The planting density was kept 90 × 45 cm. Data relating to number of storage roots, storage root weight, storage root yield per hill and storage root yield per hectare were recorded. Furthermore, quality traits, including dry matter ratio (%), protein ratio (%) and antioxidant ratio (%) of storage roots were also determined. The highest total storage root yield was recorded for ‘Havuc’ genotype during both years and locations, followed by ‘Hatay Yerlisi’ and ‘Hatay Kırmızısı’ genotypes. Overall, storage root yield (60.06 and 62.40 tons ha-1 during first and second year) recorded for the experiment at Niksar was higher than the storage root yield recorded for Kazova experiment (53.50 and 52.84 tons ha-1 during first and second year, respectively). The highest dry matter was produced by ‘Kalem’ and ‘Hatay Yerlisi’ genotypes during both years and at both locations, followed by ‘Hatay Kırmızısı’ and ‘Havuc’ genotypes. The storage roots of the tested genotypes accumulated higher dry matter at Kazova during both years. The highest protein content was obtained from the ‘Kalem’ genotype, and the protein contents of the ‘Hatay Yerlisi’ and ‘Hatay Kırmızısı’ genotypes were close to the ‘Kalem’ genotype. The results indicated that tested genotypes can successfully be cultivated in middle Black Sea climate. Therefore, production of sweet potato can be initiated in the future to meet the domestic needs for sweet potato in the country.

scholarly journals Black Polyethylene Tunnel Covers Affect Plant Production and Quality of Sweetpotato Transplants

HortScience ◽  
2000 ◽  
Vol 35 (2) ◽  
pp. 202-204
Author(s):  
D.R. La Bonte ◽  
A.Q. Villordon ◽  
J.R. Schultheis ◽  
D.W. Monks
Keyword(s):  
North Carolina ◽  
Ipomoea Batatas ◽  
Growing Season ◽  
Plant Production ◽  
Ground Control ◽  
Bare Ground ◽  
Storage Roots ◽  
Early Season ◽  
Late Season

The influence of a black polyethylene tunnel cover (BTC) was evaluated for its effect on quantity and quality of sweetpotato [Ipomoea batatas (L.) Lam.] transplants in plant beds in Louisiana and North Carolina. Use of BTC increased production of `Beauregard' transplants from 63% to 553% in comparison with the bare ground control. `Jewel' was less responsive; BTC treatments increased transplant production by at least 48% in Louisiana over the bare ground control, but no increase was observed in North Carolina. Individual transplant weight was at least 34% less in BTC treatments than in the control. The first harvest of cuttings in BTC beds was at least 14 days prior to that in control beds. Transplant quality was assessed as yield of storage roots in repeated trials that extended throughout the normal growing season. Yield of storage roots was not affected by BTC in early season plantings, but was frequently lower for BTC treatment transplants in middle and late season plantings. We therefore do not recommend this method as a means of increasing sweetpotato plant production from bedded roots.

scholarly journals Combined Heating Applications Increased Plant Production from Bedded Sweetpotato Roots

HortScience ◽  
1994 ◽  
Vol 29 (9) ◽  
pp. 1022-1024 ◽  
Author(s):  
Melvin R. Hall
Keyword(s):  
Relative Humidity ◽  
Ipomoea Batatas ◽  
Plant Production ◽  
Storage Roots

`Red Jewel' sweetpotato [Ipomoea batatas (L.) Lam.] roots were cured [32 ± 1C, 85% relative humidity (RH)] for 7 days immediately after harvest and then subjected to selected single or combined applications of additional curing, midstorage heating, and presprouting not to exceed 21 days. Extended curing was applied for 0, 7, 14, or 21 additional days before storage (16 ± 1C, 85% RH). Midway through storage, roots were heated (32 ± 1C, 85% RH) for 0, 7, 14, or 21 days and placed back into storage. Before being bedded, roots were presprouted (32 ± 1C, 85% RH) for 0, 7, 14, or 21 days. Roots that received extended curing, midstorage heating, or presprouting or a combination of these treatments emerged earlier and produced more cumulative early, midseason, and total plants than nonheated roots. Roots heated once for 21 days produced more plants than roots heated once for 14 days; those heated for 21 days in a combination of short durations produced more early, midseason, and total number of plants than roots heated once for 21 days.

scholarly journals Failure Analysis under Electric Lights: Growth and Yield of Sweetpotato in Response to 14 Days of Prolonged Darkness

HortScience ◽  
2016 ◽  
Vol 51 (12) ◽  
pp. 1479-1481
Author(s):  
Desmond G. Mortley ◽  
Douglas R. Hileman ◽  
Conrad K. Bonsi ◽  
Walter A. Hill ◽  
Carlton E. Morris
Keyword(s):  
Ipomoea Batatas ◽  
Dry Weight ◽  
Growth And Yield ◽  
Photon Flux ◽  
Storage Root ◽  
Growth Responses ◽  
Root Yield ◽  
Fibrous Root ◽  
Storage Roots ◽  
The Impact

Two sweetpotato [Ipomoea batatas (L.) Lam] genotypes (TU-82-155 and NCC-58) were grown hydroponically and subjected to a temporary loss of lighting in the form of 14 days of prolonged darkness compared with a lighted control under standard daily light periods to determine the impact on growth responses and storage root yield. Vine cuttings of both genotypes were grown in rectangular channels. At 65 days after planting, lights were turned off in the treatment chambers and replaced by a single incandescent lamp, providing between 7 and 10 µmol·m−2·s−1 photosynthetic photon flux (PPF) for 18 hours, and the temperature lowered from 28/22 °C light/dark, to a constant 20 °C. Plants remained under these conditions for 14 days after which the original light level was restored. Growth chamber conditions predark included, a PPF mean provided by 400-W metal halide lamps, of 600 ± 25 µmol·m−2·s−1, an 18-hour light/6-hour dark cycle and a relative humidity of 70% ± 5%. The nutrient solution used was a modified half-Hoagland with pH and electrical conductivity (EC) maintained between 5.5–6.0 and 1000–1200 μS·cm−1, respectively, and was adjusted weekly. Storage root number and fresh weight were similar regardless of treatments. Plants exposed to prolonged darkness produced 10.5% and 25% lower fibrous root fresh and dry mass, respectively, but similar foliage yield and harvest index (HI). ‘NCC-58’ produced an average of 31% greater storage root yield than that of ‘TU-82-155’ but the number of storage roots as well as % dry matter (%DM) were similar. ‘NCC-58’ also produced 31% greater fibrous root dry weight, whereas ‘TU-82-155’ produced a 44% greater HI. The significant interaction between prolonged darkness and cultivars for %DM of the storage roots showed that DM for ‘TU-82-155’ was 18.4% under prolonged darkness and 17.9% in the light. That for ‘NCC-58’ was 16.4% under prolonged darkness compared with 19.4% (14.8% greater) for plants that were not subjected to prolonged darkness. The evidence that there were no adverse impacts on storage root yield following the exposure to prolonged darkness suggests that the detrimental effects were below the detectable limits for these cultivars in response to the short perturbation in the available light and that sweetpotatoes would be hardy under short-term failure situations.

scholarly journals Short-duration Presprouting, Ethephon, and Cutting Increase Plant Production by Sweetpotato Roots

HortScience ◽  
1990 ◽  
Vol 25 (4) ◽  
pp. 403-404 ◽  
Author(s):  
Melvin R. Hall
Keyword(s):  
Short Duration ◽  
Phosphonic Acid ◽  
Ipomoea Batatas ◽  
Plant Production ◽  
Plant Propagation ◽  
Plant Weight ◽  
Total Plant

Sweetpotato [Ipomoea batatas (L.)] plants were harvested earlier following immersion of roots in 1500 mg ethephon/liter for 10 minutes or cut transversely 1 to 2 cm from the proximal end before bedding than when roots were not treated. Combined ethephon and cutting treatments did not promote earlier harvests than either applied separately. Presprouting for 10 days reduced the time to first plant harvest from whole or cut roots of `Georgia Red', but not from roots of `Georgia Jet'. Immersion in ethephon increased the number of early and total plants produced by both cultivars. Short-duration presprouting and cutting of roots increased the number of early and total plants produced by `Georgia Red', but not by `Georgia Jet'. Total plant production was increased by cutting non-presprouted roots that had been immersed in ethephon. Cutting did not significantly increase total plant production from presprouted roots, but immersion in ethephon increased total number of plants produced from presprouted whole roots. Plant weight and deterioration of the bedded roots during plant propagation were not influenced by treatments. Chemical name used: (2-chloroethyl)phosphonic acid (ethephon).

scholarly journals Transcriptomic and Metabolic Profiling of High-Temperature Treated Storage Roots Reveals the Mechanism of Saccharification in Sweetpotato (Ipomoea batatas (L.) Lam.)

2021 ◽  
Vol 22 (13) ◽  
pp. 6641
Author(s):  
Chen Li ◽  
Meng Kou ◽  
Mohamed Hamed Arisha ◽  
Wei Tang ◽  
Meng Ma ◽  
...  
Keyword(s):  
High Temperature ◽  
Metabolic Pathways ◽  
Transcriptome Sequencing ◽  
Ipomoea Batatas ◽  
Sequencing Analysis ◽  
Storage Roots ◽  
Metabolic Analysis ◽  
Cooking Process

The saccharification of sweetpotato storage roots is a common phenomenon in the cooking process, which determines the edible quality of table use sweetpotato. In the present study, two high saccharified sweetpotato cultivars (Y25, Z13) and one low saccharified cultivar (X27) in two growth periods (S1, S2) were selected as materials to reveal the molecular mechanism of sweetpotato saccharification treated at high temperature by transcriptome sequencing and non-targeted metabolome determination. The results showed that the comprehensive taste score, sweetness, maltose content and starch change of X27 after steaming were significantly lower than those of Y25 and Z13. Through transcriptome sequencing analysis, 1918 and 1520 differentially expressed genes were obtained in the two periods of S1 and S2, respectively. Some saccharification-related transcription factors including MYB families, WRKY families, bHLH families and inhibitors were screened. Metabolic analysis showed that 162 differentially abundant metabolites related to carbohydrate metabolism were significantly enriched in starch and sucrose capitalization pathways. The correlation analysis between transcriptome and metabolome confirmed that the starch and sucrose metabolic pathways were significantly co-annotated, indicating that it is a vitally important metabolic pathway in the process of sweetpotato saccharification. The data obtained in this study can provide valuable resources for follow-up research on sweetpotato saccharification and will provide new insights and theoretical basis for table use sweetpotato breeding in the future.

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