Drought hardening of the potato plant as an after-effect of soil drought conditions at planting

Cavagnaro, Juan Bruno; Lis, B.; Tizio, R.

doi:10.1007/bf02361832

Cited by 22 publications

(11 citation statements)

References 7 publications

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“…Drought always influences the development and growth of stems, roots and tubers of potato (Ojala et al 1990), and it also reduces the number of tubers and the yield of potato (Cavagnaro et al 1971). Genetic engineering has produced potato plants that have drought and salinity tolerance.…”

Section: Discussionmentioning

confidence: 99%

Enhanced drought and salinity tolerance in transgenic potato plants with a BADH gene from spinach

Zhang

Wen

et al. 2010

Plant Biotechnol Rep

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Drought and salinity are the most important abiotic stresses that affect the normal growth and development of plants. Glycine betaine is one of the most important osmolytes present in higher plants that enable them to cope with environmental stresses through osmotic adjustment. In this study, a betaine aldehyde dehydrogenase (BADH) gene from spinach under the control of the stress-induced promoter rd29A from Arabidopsis thaliana was introduced into potato cultivar Gannongshu 2 by the Agrobacterium tumefaciens system. Putative transgenic plants were confirmed by Southern blot analysis. Northern hybridization analysis demonstrated that expression of BADH gene was induced by drought and NaCl stress in the transgenic potato plants. The BADH activity in the transgenic potato plants was between 10.8 and 11.7 U. There was a negative relationship (y = -2.2083x ? 43.329, r = 0.9495) between BADH activity and the relative electrical conductivity of the transgenic potato plant leaves. Plant height increased by 0.4-0.9 cm and fresh weight per plant increased by 17-29% for the transgenic potato plants under NaCl and polyethylene glycol stresses compared with the control potato plants. These results indicated that the ability of transgenic plants to tolerate drought and salt was increased when their BADH activity was increased.

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Section: Discussionmentioning

confidence: 99%

Enhanced drought and salinity tolerance in transgenic potato plants with a BADH gene from spinach

Zhang

Wen

et al. 2010

Plant Biotechnol Rep

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“…The early tuberization and bulking of variety might be cause of greater yield loss in Desiree as compared to mid-late maturing genotypes. Cavagnaro et al (1971) had reported that drought stress decreased the tuber yield. In the study of Lahlou et al (2003), they reported 11% yield reduction in Desiree, and 38 % in Remarka but in our study, 87% yield reduction was recorded in Desiree.…”

Section: Marketable Tuber Weightmentioning

confidence: 99%

Growth and Yield Characters of Potato Genotypes Grown in Drought and Irrigated Conditions of Nepal

Luitel

Khatri

Choudhary

et al. 2015

Int J Appl Sci Biotechnol

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This experiment was conducted to assess the genotypic variation for the growth, yield and yield components of potato grown under drought and irrigated conditions at Hattiban Research Farm, Khumaltar during the summer cropping season (Feb.-May) of the two consecutive years (2013 and 2014). The results revealed that canopy cover, stem height and number of leavers were more sensitive to drought and the effect was more pronounced in early cultivar Desiree. Stem height and leaf number of plant were more (36% and 45%, respectively) reduced in Desiree than other genotypes. Mean tuber number decreased by 55% under drought condition. Drought stress reduced marketable tuber number by 79% as compared to irrigated treatment. Drought stress reduced the marketable tuber yield from 70% to 87%. The clones CIP 392242.25 and LBr-40 had relatively lower yield loss, and less drought susceptibility index under drought indicating their tolerance to drought in field condition. Further experiment is recommended to study the physiological parameters of these genotypes under different water and soil conditions. Int J Appl Sci Biotechnol, Vol 3(3): 513-519

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“…Potato yield is highly related to the host plant genetics and crop management practices (El-Shraiy and Hegazi, 2010 ; Khan et al, 2016 ). Water deficit during the reproductive period decreases potato carbon accumulation (Obidiegwu et al, 2015 ), reduces carbon remobilization from vegetative tissues to tubers (Ojala et al, 1990 ), and decreases the number of tubers and tuber size (Cavagnaro et al, 1971 ). One of the promising options to alleviate those water deficit-induced consequences is to use transgenic plants (Qaim and Kouser, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Roles of Plasmalemma Aquaporin Gene StPIP1 in Enhancing Drought Tolerance in Potato

et al. 2017

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Survival and mortality of plants in response to severe drought may be related to carbon starvation, but little is known about how plasma membrane intrinsic proteins may help alleviate the drought-induced damage. Here, we determined the roles of plasmalemma aquaporin gene in improving plant water status, maintaining carbon accumulation, and thereby enhancing drought tolerance. Seven StPIP1 transformed potato (Solanum tuberosum L.) lines (namely T1, T2…T7) were compared with non-transgenic control plant at molecule and whole-plant levels. The relative expression of StPIP1 gene was found in leaves, stems and roots, with the most abundant expression being in the roots. The transgenic lines T6 and T7 had the highest StPIP1 expression, averaging 7.2 times that of the control and the greatest differences occurred 48 h after mannitol osmotic stress treatment. Using an evaluation index to quantifying the degree of drought tolerance, we found that the StPIP1 transgenic lines T6 and T7 had the highest drought tolerance, averaging 8.5 times that of the control. Measured at 30 days in drought stress treatment, the control plant decreased net photosynthetic rate by 33 and 56%, respectively, under moderate and severe stresses; also decreased stomatal conductance by 39 and 65%; and lowered transpiration rate by 49 and 69%, compared to the no-stress treatment, whereas the transgenic lines T6 and T7 maintained a relatively stable level with slight decreases in these properties. The constitutive overexpression of StPIP1 in potato improved plant water use efficiency and increased nonstructural carbohydrate concentration, which helped alleviate carbon starvation and minimized the loss of biomass and tuber yield due to drought stress. We conclude that the expression of StPIPs improves overall water relations in the plant and helps maintain photosynthesis and stomatal conductance; these help minimize carbon starvation and enhance the whole plant tolerance to drought stress.

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Drought hardening of the potato plant as an after-effect of soil drought conditions at planting

Cited by 22 publications

References 7 publications

Enhanced drought and salinity tolerance in transgenic potato plants with a BADH gene from spinach

Enhanced drought and salinity tolerance in transgenic potato plants with a BADH gene from spinach

Growth and Yield Characters of Potato Genotypes Grown in Drought and Irrigated Conditions of Nepal

Roles of Plasmalemma Aquaporin Gene StPIP1 in Enhancing Drought Tolerance in Potato

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