Drought Stress in Plants: Causes, Consequences, and Tolerance

Salehi-Lisar, Seyed Yahya; Bakhshayeshan-Agdam, Hamideh

doi:10.1007/978-3-319-28899-4_1

Cited by 218 publications

(209 citation statements)

References 24 publications

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“…The CCI indirectly measured the difference of the plant photosynthetic rate, throughout the comparison of the intensity of photosynthetic electron transport (Salehi-Lisar and Bakhshayeshan-Agdam, 2016). This index varies with the plant tolerance to drought, where the higher the CCI value indicates greater plant capacity to cope with stress (Gouveia et al, 2018;Salehi-Lisar and Bakhshayeshan-Agdam, 2016;Tiwari and Mamrutha, 2013). The taro accessions showed a 1.8% increase in chlorophyll content towards drought.…”

Section: Relation Between Water Scarcity and Plant Developmentmentioning

confidence: 99%

“…Root crops can also have a typical R:S ratio increase through age, due to the investment of carbon in the underground organs (Atwell et al, 1999). The increase of photosynthetic rate is another indicator of the plant's ability to tolerate this abiotic stress, where the higher plant resistance to drought appears correlated with the highest values of chlorophyll index (Gouveia et al, 2018;Salehi-Lisar and Bakhshayeshan-Agdam, 2016;Pereira et al, 2015, Mabhaudhi andTiwari and Mamrutha, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Phenotypic flexibility and drought avoidance in taro (Colocasia esculenta (L.) Schott)

Gouveia¹,

Ganança²,

Nóbrega³

et al. 2020

Emir J Food Agric

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Taro (Colocasia esculenta (L.) Schott) is a substantial staple food in most of the tropical regions. Prolonged exposure to drought impairs crop production worldwide. Tolerant crops have the best capability to cope and avoid drought, through phenotypic flexibility mechanisms. The water use efficiency (WUE) is well known in taro crops, but very scarce information is available relating to their nutrient efficiency (NER) in drought conditions. Our work provided pertinent information about the physiological variation of seven taro accessions subjected to seven months of drought, by recording the differences for nutrient allocation, chlorophyll canopy, biomass loss, and stress intensity. Significant relationships between control and drought treatments on WUE (+85%), total plant biomass (TPB, -26.8%), chlorophyll content index (CCI, +1.8%), and nutrient harvest index (NHI, +0.2%) were detected. Drought led to a generalized loss of TPB as drought avoidance strategy, although distinct phenotypic flexibility was observed through the root:shoot ratio (R:S) and stress index (SI) from the corm and shoot organs. The nutrient allocation from the corms to shoots, with NER increase registered in drought conditions, can be a valuable tool to complement the TPB and WUE productivity traits, to be used in taro breeding programs.

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Section: Relation Between Water Scarcity and Plant Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phenotypic flexibility and drought avoidance in taro (Colocasia esculenta (L.) Schott)

Gouveia¹,

Ganança²,

Nóbrega³

et al. 2020

Emir J Food Agric

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show abstract

“…Resistance mechanisms in plants have been improved in many plants but the expression of such mechanisms depend upon plant species as well as plant growth stage (Basu et al, 2016;Duan et al, 2017). Usually, cellular homeostasis is one of the tolerance mechanisms in plants under water deficit conditions which probably takes place by raising the water absorption by the cell (Salehi-Lisar & Bakhshayeshan-Agdam, 2016). In the chloroplast, many enzymatic and non-enzymatic antioxidants are present that avert accumulation of ROS under stress conditions and safeguard the cell by controlling intracellular ROS concentration (Gapinska et al, 2008;Fathi & Tari, 2016).…”

Section: Introductionmentioning

confidence: 99%

Assessment of physio-biochemical indicators for drought tolerance in different cultivars of maize (Zea mays L.)

Shafiq¹,

Akram²,

Ashraf³

2019

PAK.J.BOT.

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Maize is an important cereal crop all-over the world and has been recently ranked at first among all cereal crops. However, growth of maize plants is negatively affected in arid and semi-arid areas of the globe due to scarcity of water, but genetically variable cultivars/lines differ considerably to respond to water limited conditions. To evaluate the response of some commercial cultivars of maize to water deficit conditions, a pot experiment was carried out. Eight maize cultivars (Sultan, Akbar, Pearl, MMRI, Maki Pak, Sahiwal 2002, Sadaf and Neelum) were subjected to varying [100%, 75% and 60% of field capacity (FC)] levels of water deficit conditions. Drought stress significantly decreased shoot fresh and dry weights, root fresh and dry weights and chlorophyll pigments (a and b) in all maize cultivars. However, free proline, glycinebetaine (GB), total phenolics, hydrogen peroxide (H2O2), malondialdehyde (MDA) contents, activities of enzymatic antioxidants (CAT, POD and SOD) and ascorbic acid (AsA) contents increased significantly under water deficit conditions. Of all maize cultivars, cv. Sadaf was superior in terms of plant growth, while, cv. Sultan proved to be inferior to the other cultivars examined in this study. It was concluded that osmoprotectants such as proline and GB can be used as stress tolerance indicators under drought stress conditions.

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“…Drought stress occurred when water availability in soil decrease due to low soil moisture at certain period of time. Water deficiency in plants occurred when transpiration is higher than water taken by the roots (Salehi-Lisar & Bakhshayeshan-Agdam, 2016).…”

Section: Introductionmentioning

confidence: 99%

Seedling Performance of Cocoa Genotypes (Theobroma cacao L.) in Drought Stress Condition.

Susilo

Sobir²,

Wuriandani³

et al. 2019

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Drought stress can affect changes in physiological, morphological, biochemical,and molecular of plant. Plant in drought stress showed slower growthand development than in normal condition. This research aimed to determine the response of cocoa genotypes in seedling phase to drought stress in morphological and stomata character. This research conducted with split-plot design with main plot were water regimes (25% and 100% available water content). Eleven genotypes were used in this research consisted of six genotypes crosses and five genotypes parents. Variables observed were stem diameter, root volume, root length, leaf area, shoot fresh weight, root fresh weight, shoot dry weight, root dry weight, root/shoot ratio, and stomatal conductance. Drought stress decreased values associated with all observed morphological characters and stomata characters. Root/shoot ratio and stomatal conductance can be used to determine genotype with tolerance to drought. Sulawesi 3 x ICCRI 09 showed heighest in root/shoot ratio and stomatal conductance. Sulawesi 3 x ICCRI 09 can be used as candidate of plant material tolerant to drought.

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Drought Stress in Plants: Causes, Consequences, and Tolerance

Cited by 218 publications

References 24 publications

Phenotypic flexibility and drought avoidance in taro (Colocasia esculenta (L.) Schott)

Phenotypic flexibility and drought avoidance in taro (Colocasia esculenta (L.) Schott)

Assessment of physio-biochemical indicators for drought tolerance in different cultivars of maize (Zea mays L.)

Seedling Performance of Cocoa Genotypes (Theobroma cacao L.) in Drought Stress Condition.

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