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Morphophysiological Responses and Tolerance Mechanisms in Cassava (Manihot esculenta Crantz) Under Drought Stress

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Abstract

Cassava (Manihot esculenta Crantz), a ”miracle of the tropics,” is a critical component of the approaches to alleviate poverty, hunger, and malnutrition and increase livelihood security. Its high inherent photosynthetic efficiency and ability to sustain growth in challenging environments make it a potential food and nutrition security crop. However, water remains the most limiting factor for future cassava production, particularly under anticipated climatic variability. Though cassava is popularized as a drought-tolerant crop, seasonal or intermittent water stress episodes affect cassava productivity by influencing plant growth, storage root yield, and quality. Successful cassava production in drought-prone areas relies on the development of drought-tolerant cultivars along with tailored agronomic practices. We reviewed multi-faceted responses from morphological level to tissue/cell level biochemical changes, root development responses, and storage root quality alterations occurring under drought and potential targets for the future breeding program. This knowledge will pave the way for developing breeding strategies and implementable agronomic methods.

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Data Availability

Data sharing does not apply to this article as no datasets were generated or analyzed during the current study.

Abbreviations

A:

Carbon assimilation

ABA:

Abscisic acid

Cal:

Calorie

CAT:

Catalase

CG:

Cyanogenic glycosides

Ci/Ca :

Ratio of internal (Ci) to atmospheric CO2 concentration

Ca :

Leaf internal carbon dioxide concentration

DAP:

Days after planting

DEGs:

Differentially expressed genes

DIRT:

Digital imaging of root traits

E:

Transpiration

ETR:

Electron transfer rate

FC:

Field capacity

FW:

Fresh weight

g:

Gram

GR:

Glutathione reductase

gs :

Stomatal conductance

h:

Hour

ha:

Hectare

HCN:

Hydrogen cyanide

HI:

Harvest index

K+ :

Potassium ion

kg:

Kilogram

LAI:

Leaf area index

m:

Meter

MAP:

Months after planting

NSC:

Nonstructural carbohydrates

OA:

Osmotic adjustment

PAR:

Photosynthetically active radiation

PCD:

Program cell death

PEPC:

Phosphoenolpyruvate carboxylase

PSII:

Photosystem II

qP:

Photochemical quenching coefficient

ROS:

Reactive oxygen species

RSA:

Root system architecture

RuBisCO:

Ribulose-1,5-bisphosphate carboxylase-oxygenase

s:

Second

SOD:

Superoxide dismutase

t:

Ton

UN:

United Nations

US$:

United States dollars

WDS:

Water-deficit stress

WP:

Water potential

WUE:

Water use efficiency

ΦPSII:

Effective quantum yield

ICAR:

Indian Council of Agricultural Research

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Authors and Affiliations

Authors

Contributions

SJM and KB: conceived the idea and design the outline of the first draft, designed the figures, and wrote the first draft. VR and RP: interpretation and critical revision. MKL: critical revision and designed the figures. AKC and KHMS: critical revision for important intellectual content and provided critical feedback. All the authors read and approved the final manuscript.

Corresponding author

Correspondence to Sanket J. More.

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Competing Interests

The authors declare no competing interests.

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More, S.J., Bardhan, K., Ravi, V. et al. Morphophysiological Responses and Tolerance Mechanisms in Cassava (Manihot esculenta Crantz) Under Drought Stress. J Soil Sci Plant Nutr 23, 71–91 (2023). https://doi.org/10.1007/s42729-023-01127-4

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  • DOI: https://doi.org/10.1007/s42729-023-01127-4

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