Water restriction scenarios and their effects on traits in potato with different degrees of drought tolerance

X, Li; Ramírez, David A.; Qin, Jianying; Dormatey, Richard; Bi, Zhenzhen; Sun, Cheng; Wang, Han; Bai, Jiangping

doi:10.1016/j.scienta.2019.05.052

Cited by 20 publications

(27 citation statements)

References 59 publications

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“…However, in our experiment the relative chlorophyll content increased significantly for the plants under a water deficit ( Table 1 ). This trend has been reported in other studies on potato plants under a water deficit and is associated with a lack of leaf expansion growth and the presence of free radical detoxification mechanisms [ 13 , 24 , 55 ]. Nevertheless, further research on the activity of antioxidant enzymes, photosynthesis rate and growth rate are required.…”

Section: Discussionsupporting

confidence: 78%

“…Several attempts have been made to screen for water deficit tolerance in potato diversity collections. These studies have evaluated physiological characteristics, such as photosynthesis capacity [ 21 ], relative water content (RWC), chlorophyll content [ 15 ], carbon isotope discrimination [ 22 ], gas exchange parameters [ 22 , 23 ], canopy growth [ 20 ], carbon partitioning [ 14 ], starch content [ 6 ] and drought index [ 24 , 25 ]. The response magnitude to water deficits in genotypes depends on the intensity, timing and duration of water restrictions, which impact the selection of appropriate variables for water deficit tolerance [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

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Physiological, Biochemical and Yield-Component Responses of Solanum tuberosum L. Group Phureja Genotypes to a Water Deficit

Diaz-Valencia

Melgarejo

Arcila

et al. 2021

Plants

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Water deficits are the major constraint in some potato-growing areas of the world. The effect is most severe at the tuberization stage, resulting in lower yield. Therefore, an assessment of genetic and phenotypic variations resulting from water deficits in Colombia germplasm is required to accelerate breeding efforts. Phenotypic variations in response to a water deficit were studied in a collection of Solanum tuberosum Group Phureja. A progressive water deficit experiment on the tuberization stage was undertaken using 104 genotypes belonging to the Working Collection of the Potato Breeding Program at the Universidad Nacional de Colombia. The response to water deficit conditions was assessed with the relative chlorophyll content (CC), maximum quantum efficiency of PSII (Fv/Fm), relative water content (RWC), leaf sugar content, tuber number per plant (TN) and tuber fresh weight per plant (TW). Principal Component Analysis (PCA) and cluster analysis were used, and the Drought Tolerance Index (DTI) was calculated for the variables and genotypes. The soluble sugar contents increased significantly under the deficit conditions in the leaves, with a weak correlation with yield under both water treatments. The PCA results revealed that the physiological, biochemical and yield-component variables had broad variation, while the yield-component variables more powerfully distinguished between the tolerant and susceptible genotypes than the physiological and biochemical variables. The PCA and cluster analysis based on the DTI revealed different levels of water deficit tolerance for the 104 genotypes. These results provide a foundation for future research directed at understanding the molecular mechanisms underlying potato tolerance to water deficits.

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Section: Discussionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Physiological, Biochemical and Yield-Component Responses of Solanum tuberosum L. Group Phureja Genotypes to a Water Deficit

Diaz-Valencia

Melgarejo

Arcila

et al. 2021

Plants

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“…The slope of the decline of NDVI from its maximum value along the time, fitted by a linear function (NDVI

), was used as indicator of senescence delay (higher values means longer senescence delay) [ 22 , 23 ]. The tuberization precocity proxy was represented by

[ 26 ]—parameter from the Gompertz function, modeled by SOLANUM that indicates the time when the maximum tuber partitioning rate occurred (see Condori et al [ 7 ] for further details).…”

Section: Methodsmentioning

confidence: 99%

“…It is possible to increase its duration by delaying leaf senescence, which offers an opportunity for increasing the total amount of carbon fixed by a crop [10,20]. The delay of senescence that occurs in some potato varieties is defined as the slope of the pattern of greenness loss [21], calculated from chlorophyll concentration surrogate measurements [22], it has shown strong positive correlation with yield in potato [23,24]. Therefore, it is a desired trait in breeding programs because it is generally associated with an extension of photosynthetic activity [25].…”

Section: Introductionmentioning

confidence: 99%

Radiation Interception, Conversion and Partitioning Efficiency in Potato Landraces: How Far Are We from the Optimum?

Silva-Díaz

Ramírez

Rinza

et al. 2020

Plants

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Crop efficiencies associated with intercepted radiation, conversion into biomass and allocation to edible organs are essential for yield improvement strategies that would enhance genetic properties to maximize carbon gain without increasing crop inputs. The production of 20 potato landraces—never studied before—was analyzed for radiation interception ( ε i ), conversion ( ε c ) and partitioning ( ε p ) efficiencies. Additionally, other physiological traits related to senescence delay (normalized difference vegetation index (NDVI) s l p ), tuberization precocity ( t u ), photosynthetic performance and dry tuber yield per plant (TY) were also assessed. Vegetation reflectance was remotely acquired and the efficiencies estimated through a process-based model parameterized by a time-series of airborne imageries. The combination of ε i and ε c , closely associated with an early tuber maturity and a NDVI s l p explained 39% of the variability grouping the most productive genotypes. TY was closely correlated to senescence delay (r P e a r s o n = 0.74), indicating the usefulness of remote sensing methods for potato yield diversity characterization. About 89% of TY was explained by the first three principal components, associated mainly to t u , ε c and ε i , respectively. When comparing potato with other major crops, its ε p is very close to the theoretical maximum. These findings suggest that there is room for improving ε i and ε c to enhance potato production.

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“…An average of four readings from four young and sun-exposed leaves were taken per plant. Senescence (S) was estimated on each plant as the slope generated by fitting Chl SPAD (from maximum leaf greenness to harvest) vs. time on a linear function (Li et al, 2019). Assuming that an extended senescence delay (high S) is associated with a higher probability of fixing more carbon during the lifespan, short-term memory proxy's (STM) effect on S (STM S ) was calculated as follows:…”

Section: Ecophysiological Measurements To Determine Potential Short-tmentioning

confidence: 99%

Potential Short-Term Memory Induction as a Promising Method for Increasing Drought Tolerance in Sweetpotato Crop Wild Relatives [Ipomoea series Batatas (Choisy) D. F. Austin]

et al. 2020

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Water restriction scenarios and their effects on traits in potato with different degrees of drought tolerance

Cited by 20 publications

References 59 publications

Physiological, Biochemical and Yield-Component Responses of Solanum tuberosum L. Group Phureja Genotypes to a Water Deficit

Physiological, Biochemical and Yield-Component Responses of Solanum tuberosum L. Group Phureja Genotypes to a Water Deficit

Radiation Interception, Conversion and Partitioning Efficiency in Potato Landraces: How Far Are We from the Optimum?

Potential Short-Term Memory Induction as a Promising Method for Increasing Drought Tolerance in Sweetpotato Crop Wild Relatives [Ipomoea series Batatas (Choisy) D. F. Austin]

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