Effect of in vitro and in vivo induction of polyethelene glycol-mediated osmotic stress on hybrid taro (Colocasia esculenta (L.) Schott)

Sahoo, Manas Ranjan; Dasgupta, Madhumita; Mukherjee, Archana

doi:10.32945/atr2821.2006

Cited by 9 publications

(9 citation statements)

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“…Therefore, results observed implied energy dissipation mechanism in taro landraces. Our findings also agree with Sahoo et al (2006) who reported lower chlorophyll stability index in a taro hybrid subjected to water stress. This response was clear in the UM landrace, suggesting the UM landrace was able to down-regulate its photosynthesis in line with decreasing CO 2 availability.…”

Section: Discussionsupporting

confidence: 93%

“…In addition, water stress was shown to reduce leaf number and leaf area of both cultivars. In India, Sahoo et al (2006), using taro hybrids, reported significant variations for taro growth parameters such as height, leaf number and leaf area, leaf relative water content, chlorophyll stability index and injury by desiccation in response to osmotic stress. They concluded that development of drought tolerant varieties of taro was a possibility after observing tolerance to osmotic stress with negligible yield reduction in the taro hybrid.…”

Section: Introductionmentioning

confidence: 99%

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DROUGHT TOLERANCE OF SELECTED SOUTH AFRICAN TARO (COLOCASIA ESCULENTAL. SCHOTT) LANDRACES

Mabhaudhi

Modi

2014

Ex. Agric.

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SUMMARYDrought tolerance mechanisms of three taro landraces (Dumbe Lomfula (DL), KwaNgwanase (KW) and Umbumbulu (UM)) were evaluated under field conditions Pietermaritzburg, South Africa, over two summer seasons. Taro was slow to emerge (~ 49 days) and showed significant differences between landraces with respect to final emergence with DL never achieving a good crop stand. Growth (plant height, leaf number and LAI), VGI, SC and CCI were significantly lower under rainfed (RF) than irrigated conditions. RF conditions resulted in significantly lower biomass, HI, and final yield of taro landraces compared to irrigated conditions. The UM landrace avoided drought through increased stomatal regulation, lowering chlorophyll content, smaller canopy size and reduced growth period. It is concluded that among the three landraces, UM is suitable for production under water stress conditions, because it exhibited drought avoidance and escape mechanisms.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

DROUGHT TOLERANCE OF SELECTED SOUTH AFRICAN TARO (COLOCASIA ESCULENTAL. SCHOTT) LANDRACES

Mabhaudhi

Modi

2014

Ex. Agric.

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“…CAT activity increased with increase in PEG stress and was found to be 1.7-fold induced in Sreedhara at higher stress conditions; showing its efficiency in reducing the toxic effects of generated H 2 O 2 . Our previous study also showed an increase in CAT activity under PEG induced osmotic stress in taro 29 . We have also observed a significant increment in the activity of H 2 O 2 scavenging enzyme GPX in Sreedhara (upto 7.8-fold change) at higher stress.…”

Section: Discussionmentioning

confidence: 57%

“…On the contrary, Nidhi showed an indication of susceptibility towards PEG stress by exhibiting more growth retardation in vitro. Our previous studies in taro, a carbohydrate-rich tuber crop, demonstrated the detrimental effect of PEG on shoot proliferation in vitro 29 . Reports have also shown that limited www.nature.com/scientificreports www.nature.com/scientificreports/ water availability restricted cell division and elongation and thereby hinders plant growth and development 30,31 .…”

Section: Discussionmentioning

confidence: 95%

Reactive oxygen species scavenging mechanisms associated with polyethylene glycol mediated osmotic stress tolerance in Chinese potato

Sahoo

Devi

Dasgupta

et al. 2020

Sci Rep

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Influence of polyethylene glycol (PEG) mediated osmotic stress on reactive oxygen species (ROS) scavenging machinery of Chinese potato (Solenostemon rotundifolius (Poir.) J. K. Morton) was investigated. Five genotypes of Chinese potato were raised in Murashige and Skoog (MS) basal medium containing 6-benzylaminopurine (BAP, 1 mg L-1) along with various concentrations of PEG-6000 mediated stress conditions (0,-0.2 and-0.5 MPa) and evaluated for osmotic stress tolerance in vitro. The medium containing PEG-6000 had a detrimental effect on plantlet growth and development while compared with the control. Accumulation of H 2 o 2 was lower in Sreedhara and Subala and higher in Nidhi under PEG stress, which was evident by in situ detection in leaves. Lipid peroxidation product such as malondialdehyde (MDA) content was increased due to PEG stress which was more in susceptible genotype than that in tolerant ones. An enhanced ROS-scavenging antioxidant enzyme was observed under stress with respect to the control. The enzymes of ascorbate-glutathione cycle showed an important role in scavenging ROS. The imposition of PEG stress also increased the non-enzymatic antioxidants viz., the ascorbate and reduced glutathione content which was prominent in tolerant genotypes in comparison to susceptible. The present study indicated that, Sreedhara and Subala showed more tolerance to osmotic stress with better ROS scavenging machineries which would be the lines of interest for augmenting future breeding strategies in this climate resilient minor tuber crop. Chinese potato (Solenostemon rotundifolius (Poir.) J. K. Morton), belongs to the family Lamiaceae, is one of the important minor tuber crops grown in the tropics of the world. The tubers of this crop are rich in carbohydrates and minerals 1 which provide essential dietary and energy supplements during the lean periods. It could be the better alternative to potato (Solanum tuberosum L.) for the tropics of the world under changing climatic conditions; where potato fails to grow due to global warming. Chinese potato can grow in a wide range of environmental conditions. Despite its wide adaptability, the productivity (18-20 t/ha) was severely affected due to osmotic stress. Under natural conditions, plant growth and development often challenged by various stresses 2 , of which, osmotic stress is one of the most limiting factors which can cause 20-98% of yield reductions 3. To elucidate the plant response to osmotic stress, in vitro cultures are preferred as it minimizes nutrient and environmental variations under control conditions 4. In this investigation, we have used polyethylene glycol (PEG-6000) to induce osmotic stress conditions in vitro. In plant osmotic stress studies, PEG is widely used as a potential osmoticum in the nutrient medium to induce water deficit 5. Induced osmotic stress resulted in overproduction of reactive oxygen species (ROS) which was considered as a hallmark of plant stress response. To scavenge the toxic consequences of ROS, plant deploys antioxidative mecha...

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“…Sutra, Bentul, S28, and S19 genotypes under SWC had a higher number of leaf 77.5%, 48.9%, 180.8%, and 100% than those in DC at 18 MST, respectively. Low leaf number of taro under dry condition is common as a phenotypic adaptation mechanism to reduce excess transpiration (Ganança et al 2018) and due to premature leaf aging (Sahoo et al 2008;Mabhaudhi et al 2013). Genetically, it seems that the dasheen type had a larger leaf number than eddoe type, irrespective of the cultivation system.…”

Section: Plant Growthmentioning

confidence: 99%

Phenotypic plasticity of eddoe and dasheen taro genotypes in response to saturated water and dryland cultivations

et al. 2020

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Abstract. Hidayatullah CSR, Santosa E, Sopandie D, Hartono A. 2020. Phenotypic plasticity of eddoe and dasheen taro genotypes in response to saturated water and dryland cultivations. Biodiversitas 21: 4550-4557. The phenotypic plasticity of dasheen and eddoe taro genotypes was evaluated based on growth and yield characters to select proper genotypes in response to climate change. The study was conducted at the Leuwikopo Experimental Farm, Bogor, Indonesia from May to October 2019. Dasheen (Talas Sutra and Talas Bentul) and eddoe genotypes (S28 and S19) were planted in saturated water cultivation (SWC) and dryland cultivation (DC). DC relied on rainwater, and SWC was manipulated dryland by flooding. SWC promoted vigorous growth and tuber weight, irrespective of genotypes. Increasing taro biomass production in SWC was supported by higher photosynthetic rate, leaf number, and size. Dasheen genotypes produced higher tuber weight than the eddoe in SWC, conversely, the eddoe tended to produced heavier tuber than the dasheen in DC; indicating phenotypic plasticity is strongly affected by soil moisture and genotype. The dasheen had more plastic growth and yield characters to soil moisture than the eddoe genotypes, with plasticity level, ranging from low to very high. Taro had high resiliency to multiple abiotic stresses, e.g. flood, and drought. Considering the marketable value of the yield, dasheen and eddoe genotypes are recommended in flooding and drought-prone areas, respectively.

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Effect of in vitro and in vivo induction of polyethelene glycol-mediated osmotic stress on hybrid taro (Colocasia esculenta (L.) Schott)

Cited by 9 publications

References 5 publications

DROUGHT TOLERANCE OF SELECTED SOUTH AFRICAN TARO (COLOCASIA ESCULENTAL. SCHOTT) LANDRACES

DROUGHT TOLERANCE OF SELECTED SOUTH AFRICAN TARO (COLOCASIA ESCULENTAL. SCHOTT) LANDRACES

Reactive oxygen species scavenging mechanisms associated with polyethylene glycol mediated osmotic stress tolerance in Chinese potato

Phenotypic plasticity of eddoe and dasheen taro genotypes in response to saturated water and dryland cultivations

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