scholarly journals Effect of water deficit on some physiological and biochemical responses of the yellow diploid potato (Solanum tuberosum L. Group Phureja)

2020 ◽  
Vol 38 (1) ◽  
pp. 36-44
Author(s):  
Wilmar Ariza ◽  
Luis Ernesto Rodríguez ◽  
Darwin Moreno-Echeverry ◽  
Carlos Arturo Guerrero ◽  
Liz Patricia Moreno
Keyword(s):  
Solanum Tuberosum ◽  
Stomatal Conductance ◽  
Water Deficit ◽  
Solanum Tuberosum L ◽  
Tuber Initiation ◽  
Diploid Potato ◽  
Biochemical Responses ◽  
Shoot Ratio ◽  
Root Shoot Ratio ◽  
Physiological And Biochemical

Water availability is one of the main limitations of potato yields due to the high sensitivity of this crop to water deficit. The objective of this study was to determine the effect of water deficit on some physiological and biochemical responses in yellow diploid potato plants (Solanum tuberosum L. Group Phureja) of the cultivars Criolla Colombia, Criolla Dorada and Criolla Ocarina. Plants at tuber initiation were subjected to two treatments: continuous irrigation and water deficit imposed by withholding water at tuber initiation for 17 d. The results showed that plants under water deficit increased chlorophyll concentration, malondialdehyde and proline content. However, these plants showed a decrease in stomatal conductance, leafarea, total dry mass and exhibited a higher root/shoot ratio in all potato cultivars. In addition, all the cultivars also showed a decrease in yield, which was associated with sensitivity to water stress. Although the high content of proline and high root/shoot ratio may be associated with tolerance to water deficit, this association was not observed in these cultivars, probably due to the high reduction of stomatal conductance, which limited the production of photoassimilates, plant growth, and,therefore, the yield.

Cytokinins and Tuber Initiation in the Potato Solanum tuberosum L.

Nature ◽  
1969 ◽  
Vol 221 (5177) ◽  
pp. 279-280 ◽  
Author(s):  
C. E. PALMER ◽  
O. E. SMITH
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Tuber Initiation

scholarly journals Effect of Ethylene on Tuber Initiation in Solanum tuberosum L.

Nature ◽  
1969 ◽  
Vol 223 (5213) ◽  
pp. 1387-1387 ◽  
Author(s):  
A. H. CATCHPOLE ◽  
J. HILLMAN
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Tuber Initiation

BIOMAGNETIC RESPONSES IN POTATOES

1972 ◽  
Vol 52 (5) ◽  
pp. 727-733 ◽  
Author(s):  
U. J. PITTMAN
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Magnetic Treatment ◽  
Metabolic Process ◽  
Tuber Initiation

Plants grown in the greenhouse from excised magnetically treated eyes of the Netted Gem potato, Solanum tuberosum L., yielded a greater weight and a greater number of tubers than those grown from untreated eyes. Pregermination magnetic treatment of the eyes sometimes produced an increase in top growth of plants. Plants grown in the field from excised magnetically treated eyes yielded 14% more marketable tubers that weighed 38.5% more than those grown from untreated eyes. Pregermination magnetic treatment of the eye may have effected a change in the metabolic process in the bud that eventually promoted earlier and greater tuber initiation.

Two potato (Solanum tuberosum) varieties differ in drought tolerance due to differences in root growth at depth

2014 ◽  
Vol 41 (11) ◽  
pp. 1107 ◽  
Author(s):  
Jaime Puértolas ◽  
Carlos Ballester ◽  
E. David Elphinstone ◽  
Ian C. Dodd
Keyword(s):  
Solanum Tuberosum ◽  
Drought Tolerance ◽  
Root Growth ◽  
Water Deficit ◽  
Solanum Tuberosum L ◽  
Shoot Biomass ◽  
Genotypic Differences ◽  
Deep Soil ◽  
Soil Layers ◽  
Cultural Conditions

To test the hypothesis that root growth at depth is a key trait explaining some genotypic differences in drought tolerance in potato (Solanum tuberosum L.), two varieties (Horizon and Maris Piper) differing in drought tolerance were subjected to different irrigation regimes in pots in a glasshouse and in the field under a polytunnel. In the glasshouse, both cultivars showed similar gas exchange, leaf water potential, leaf xylem ABA concentration and shoot biomass independently of whether plants were grown under well watered or water deficit conditions. Under well watered conditions, root growth was three-fold higher in Horizon compared with Maris Piper, 3 weeks after emergence. Water deficit reduced this difference. In the polytunnel, applying 60% or less irrigation volume compared with full irrigation significantly decreased tuber yield in Maris Piper but not in Horizon. This was coincident with the higher root density of Horizon in deep soil layers (>40 cm), where water content was stable. The results suggest that early vigorous root proliferation may be a useful selection trait for maintaining yield of potato under restricted irrigation or rainfall, because it rapidly secures access to water stored in deep soil layers. Although selecting for vigorous root growth may assist phenotyping screening for drought tolerance, these varieties may require particular environmental or cultural conditions to express root vigour, such as sufficiently deep soils or sufficient water shortly after emergence.

scholarly journals Root-shoot ratio of maize (Zea mays L.) as influenced by different levels of water deficit under two different climatic conditions

2018 ◽  
Vol 2ndInt.Conf.AGR (Special Issue) ◽  
pp. 87-96
Author(s):  
Mardin Othman Othman ◽  
◽  
Aram Abbas Mohammed Mohammed ◽  
Keyword(s):  
Zea Mays ◽  
Water Deficit ◽  
Zea Mays L ◽  
Climatic Conditions ◽  
Shoot Ratio ◽  
Root Shoot Ratio ◽  
Different Levels
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