Terminal drought effect on sugar partitioning and metabolism is modulated by leaf stay-green and panicle size in the stem of sweet sorghum (Sorghum bicolor L. Moench)

Tovignan, Thierry Klanvi; Adoukonou‐Sagbadja, Hubert; Diatta, Cyril; Clément‐Vidal, Anne; Soutiras, Armelle; Cissé, Ndiaga; Luquet, Delphine

doi:10.1186/s43170-020-00003-w

Cited by 19 publications

(14 citation statements)

References 28 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Crops respond to drought stress conditions to varying extents through different mechanisms. Drought tolerance involves physiological and molecular mechanisms (Sabadin et al 2012 ) for activation of relevant genes and pathways, allocation of energy and resource for cellular functioning, and modification in stomatal conductance and transpiration as well as for increasing water use efficiency and promoting stay-green (Tovignan et al 2020 ). Thus, drought tolerance is a result of diverse physico-chemical alterations (Sehgal et al 2018 ; Impa et al 2019 ) leading to fitness costs that hampers crop productivity.…”

Section: The Effect Of Drought Stress On Sorghum Grain Yieldmentioning

confidence: 99%

Sorghum in dryland: morphological, physiological, and molecular responses of sorghum under drought stress

Abreha

Enyew

Carlsson

et al. 2021

Planta

View full text Add to dashboard Cite

Main conclusion Droughts negatively affect sorghum’s productivity and nutritional quality. Across its diversity centers, however, there exist resilient genotypes that function differently under drought stress at various levels, including molecular and physiological. Abstract Sorghum is an economically important and a staple food crop for over half a billion people in developing countries, mostly in arid and semi-arid regions where drought stress is a major limiting factor. Although sorghum is generally considered tolerant, drought stress still significantly hampers its productivity and nutritional quality across its major cultivation areas. Hence, understanding both the effects of the stress and plant response is indispensable for improving drought tolerance of the crop. This review aimed at enhancing our understanding and provide more insights on drought tolerance in sorghum as a contribution to the development of climate resilient sorghum cultivars. We summarized findings on the effects of drought on the growth and development of sorghum including osmotic potential that impedes germination process and embryonic structures, photosynthetic rates, and imbalance in source-sink relations that in turn affect seed filling often manifested in the form of substantial reduction in grain yield and quality. Mechanisms of sorghum response to drought-stress involving morphological, physiological, and molecular alterations are presented. We highlighted the current understanding about the genetic basis of drought tolerance in sorghum, which is important for maximizing utilization of its germplasm for development of improved cultivars. Furthermore, we discussed interactions of drought with other abiotic stresses and biotic factors, which may increase the vulnerability of the crop or enhance its tolerance to drought stress. Based on the research reviewed in this article, it appears possible to develop locally adapted cultivars of sorghum that are drought tolerant and nutrient rich using modern plant breeding techniques.

show abstract

Section: The Effect Of Drought Stress On Sorghum Grain Yieldmentioning

confidence: 99%

Sorghum in dryland: morphological, physiological, and molecular responses of sorghum under drought stress

Abreha

Enyew

Carlsson

et al. 2021

Planta

View full text Add to dashboard Cite

show abstract

“…Drought stress can negatively affect sorghum development and yield depending on its intensity and the stage at which it occurs. Previous studies reported that drought occurring at post-flowering stage affect negatively sorghum mainly on grain yield, biomass and stem sugar accumulation [13][14][15][16]. However, very little is known about the effect of early drought stress on sorghum development and production stages.…”

Section: Introductionmentioning

confidence: 99%

Adaptation Responses to Early Drought Stress of West Africa Sorghum Varieties

et al. 2021

Self Cite

View full text Add to dashboard Cite

Sorghum is the fifth most important cereal crop world-wide and feeds millions of people in the Sahel. However, it often faces early-stage water deficit due to false onsets of rainy seasons resulting in production decrease. Therefore, developing early drought tolerant material becomes a necessity but requires a good knowledge of adaptation mechanisms, which remains to be elucidated. The present study aimed at assessing the effects of early drought stress on ten elite sorghum varieties tested over two years (2018–2019) at the National Agronomic Research Centre (CNRA) of Bambey (Senegal, West Africa). Two different water regimes (well-watered and drought stress) were applied during the dry season. Water stress was applied by withholding irrigation 25 days after sowing for one month, followed by optimal irrigation until maturity. Soil moisture measurements were performed and allowed to follow the level of stress (down to a fraction of transpirable soil water (FTSW) of 0.30 at the end of stress). An agro-physio-morphological monitoring was carried out during the experiment. Results showed highly significant effects of early drought stress in sorghum plants growth by decreasing leaf appearance, biomass, height but also yield set up. The combined analysis of variance revealed highly significant differences (p ≤ 0.01) between varieties in the different environments for most characters. Under water deficit, the variability was less strong on leaf appearance and plant height at the end of stress. The adaptation responses were related to the capacity of varieties to grow up fast and complete their cycle rather, increase the dead leaves weight, reduce photosynthesis rate, stomatal conductance, leaf transpiration and increase the roots length density. However, varieties V1, V2, V8 and V9 showed promising behavior under stress and could be suitable for further application in West Africa for sorghum breeding and farming.

show abstract

“…At the physiological level, it can disrupt metabolism, thereby affecting crop yields. The metabolic process is characterized by the formation of compounds in response to drought conditions, such as sugar [44,45], glycine-betaine [46,47], proline [48,49], and ABA [50,51].…”

Section: Water Deficitmentioning

confidence: 99%

Drought Stress: Responses and Mechanism in Plants

Pamungkas¹,

Suwarto

Suprayogi

et al. 2022

RAS

View full text Add to dashboard Cite

The function of water for plants is crucial, including playing the roles in metabolic reactions. The aims of this article are to give information on the effects of drought stress on plant morphology, physiology, and biochemistry, as well as mitigation methods in drought stress management for plant production. Plants manage drought stress using a mechanism, namely drought escape, drought avoidance and drought tolerance. Drought escape is the ability of plants to accelerate flowering or life cycle, drought avoidance is the ability of plants to reduce water loss and increase water absorption through morphological changes in the root system, drought tolerance is the plant adaptation to drought by changes in plant physiological and biochemical processes. Physiological changes that occur include closing the stomata and decreased photosynthesis. The biochemical responses include the synthesis of solute compounds as a form of osmotic adjustment in the cell called osmotic adjustment to reduce water loss from the cell. The biochemical indicators are the increased concentrations of abscisic acid (ABA), proline, and sugar (trehalose). ABA acts as a signal to stimulate stomatal closure to reduce the transpiration rate. Proline is an indicator of plants adapting to drought stress, playing a role in the osmotic adjustment of cells to retain in the cell. Trehalose is a compatible sugar acting as an osmoprotectant, it can maintain the integrity of cell membranes (water replacement) and form hydrogen bonds (water entrapment). Plants under drought stress conditions can adapt by making morphological, physiological, and biochemical responses by osmotic adjustment. These conditions need to be managed so that appropriate strategies and technologies are needed as mitigation measures.

show abstract

Terminal drought effect on sugar partitioning and metabolism is modulated by leaf stay-green and panicle size in the stem of sweet sorghum (Sorghum bicolor L. Moench)

Cited by 19 publications

References 28 publications

Sorghum in dryland: morphological, physiological, and molecular responses of sorghum under drought stress

Sorghum in dryland: morphological, physiological, and molecular responses of sorghum under drought stress

Adaptation Responses to Early Drought Stress of West Africa Sorghum Varieties

Drought Stress: Responses and Mechanism in Plants

Contact Info

Product

Resources

About