Okra growth and drought tolerance when exposed to water regimes at different growth stages

Adejumo, Sifau A.; Ezeh, Okechukwu S.; Mur, Luis A. J.

doi:10.1080/19315260.2018.1501788

Cited by 19 publications

(18 citation statements)

References 41 publications

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“…Chemical analysis of the soil showed that the soil was slightly acidic with pH of 5.24 in water and 5.01 in KCl. The organic matter, total nitrogen and available phosphorus were 23.2 g/kg, 2.4 g/kg and 43.69 mg/g respectively while, the micro nutrients were 94.23 mg/g of Mn, 80.11 mg/g of Fe, 2.92 mg/g of Cu and 63.11 mg/g of Zn (Adejumo et al, 2018). Compost was made from Mexican sunflower (Tithonia diversifolia) and poultry manure.…”

Section: Methodsmentioning

confidence: 99%

“…Drought most especially has been found to induce the production of proline in different crops (Adejumo et al, 2018;Hasanuzzaman et al, 2018). Increase in proline content was also reported in plants growing on heavy metal contaminated soil (Adejumo et al, 2015).…”

Section: Introductionmentioning

confidence: 90%

“…Growth and yield parameters Data were collected fortnightly on vegetative parameters such as plant height, number of leaves and leaf area. Leaf area was estimated using graphical method as described by Adejumo et al (2018).…”

Section: Data Collectionmentioning

confidence: 99%

“…Changes in the water balance and the amount of water available in soil are crucial for crop growth and development (Fuhrer, 2003;Krouma, 2010). Substantial reduction in the plant growth and yield due to water stress has been reported (Burke, 2007;Manivannan et al, 2008;Jalal et al, 2012;Hayatu et al, 2014;Adejumo et al, 2018). Severe drought stress induces production of reactive oxygen species which might in turn degrade the cell biomolecules (Lawlor and Cornic, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…However, the physiological mechanisms for drought stress tolerance in crop at different growth stages and the roles of organic manure in alleviating drought induced damage in crop need to be well elucidated for the purpose of enhancing crop yield under environmental stresses and to adapt the crop to climate change. Previously, we reported the adverse effect of longer duration of severe water stress on crop most especially at reproductive stage (Adejumo et al, 2018), the objective of the study therefore was to determine the roles of organic amendment in drought tolerance response of okra exposed to water deficit at various growth stages. Application of organic amendment for optimum crop yield in the face of changing climatic conditions will be a promising approach for adapting to climate change and increasing crop tolerance to environmental stresses.…”

Section: Introductionmentioning

confidence: 99%

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Ameliorative roles of compost on okra (Abelmoschus esculentus L.) exposed to drought stress at vegetative and reproductive growth stages

Ezeh

Adejumo

2020

Not Sci Biol

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Okra growth and yield are adversely affected by drought at different growth stages. This is aggravated by poor soil fertility. In this study, the roles of compost applied at 0, 5 and 10 t/ha on the tolerance and morpho-physiological response of okra (NHAe 47-4) exposed to varying levels of water stress (25%, 50%, 75% and 100% field capacity, FC), at different growth stages (vegetative, reproductive and vegetative-reproductive stages) for ten days duration were assessed. Data were collected on okra growth and yield, leaf relative water content (LRWC), leaf photosynthetic pigments (LPG) and proline accumulation. Results showed that drought stress reduced LRWC, LPG, growth and yield of Okra. This reduction was more evident in okra plants exposed to severe stress for 10 days and at the reproductive stage. Soil amendment with compost however, had cushioning effect on drought stressed okra. Compared to control, it increased the LRWC, LPG, growth and yield of okra. The ameliorative roles of compost were however, dependent on stress intensity, compost dosage, okra growth stage and stress duration. Though, okra plants stressed at 25% FC were more affected by drought stress, but compared to the un-amended soil, those grown on amended soil were more tolerant. Higher compost rate was superior to lower rates. Whereas, higher proline accumulation was recorded in plant exposed to 25% field capacity without amendment, proline accumulation was reduced in the plants grown on compost amended soil and exposed to drought which was an indication of stress reduction. Generally, okra stressed at vegetative growth stage only was able to recover rapidly and had better yield compared to those stressed at reproductive growth stage. It is concluded that addition of compost to soil could reduce the drought stress effect on okra.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

Section: Data Collectionmentioning

confidence: 99%