Drought stress in sunflower: Physiological effects and its management through breeding and agronomic alternatives

Hussain, Mubshar; Farooq, Shahid; Hasan, Waseem; Ul‐Allah, Sami; Tanveer, Mohsin; Farooq, Muhammad; Nawaz, Ahmad

doi:10.1016/j.agwat.2018.01.028

Cited by 309 publications

(242 citation statements)

References 116 publications

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“…Bray et al [36] have reported that abiotic stress can reduce the yield by 82% for wheat (Triticum aestivum L.), 69% for soybean (Glycine max L.) and 66% for maize (Zea mays L.). Drought is a major environmental stress factor that affects the growth, yield and quality of various plant species [35,[37][38][39][40]. Moradi-Ghahderijani et al [41] reported that severe water stress lessened the sunflower oil yield by 58%.…”

Section: Introductionmentioning

confidence: 99%

Integrative Effects of Rice-Straw Biochar and Silicon on Oil and Seed Quality, Yield and Physiological Traits of Helianthus annuus L. Grown under Water Deficit Stress

et al. 2019

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Water deficit stress can negatively affect oil quality, crop yields and soil infertility. Thus, we investigated the effects of rice-straw biochar, foliar silicon and their combination on quality, yield and physiological traits of sunflower grown under three water deficit stress treatments. Water stress treatments were 50% (WS0; no stress), 70% (WS1; moderate stress) and 90% (WS2; severe stress) depletion of the available soil moisture. The results showed that WS1 and WS2 negatively affected oil quality, mycorrhizal spores, yield and physiological traits of the sunflower; however, biochar, silicon and their combination significantly (p ≤ 0.05) improved most of those traits. Oil and oleic acid contents of sunflower grown under WS2 were decreased by 18% and 25.8% compared to those grown under WS0, respectively. Nevertheless, the biochar and silicon combination resulted in higher oil (10.2%) and oleic acid (12.2%) in plants grown under WS2 than those grown in untreated plots. Also, a significant increase (182% and 277%) in mycorrhizal spores was obtained in soil treated combination of biochar and silicon under WS1 and WS2 in comparison to untreated soil, respectively. On the other hand, plants grown under WS1 and WS2 exhibited reduced seed yield ha−1 by 16.5% and 53.5% compared to those grown under WS0, respectively. However, seed yield ha−1 were increased by 26.8% and 27.1% in plots treated with combined treatment compared to untreated plants, respectively. In addition, the biochar and silicon combination significantly increased stomatal conductance by 21.4% and 12.1%, reduced proline by 56.6% and 51.2% and reduced catalase activity by 13.4% and 17.3% under WS1 and WS2 compared to those grown in untreated plots, respectively. Therefore, the combined treatment of biochar and silicon can minimize and alleviate the negative effects of WS1 and WS2, improve oil quality, physiological traits, microbial activity and seed yield ha−1in sunflower plants.

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Section: Introductionmentioning

confidence: 99%

Integrative Effects of Rice-Straw Biochar and Silicon on Oil and Seed Quality, Yield and Physiological Traits of Helianthus annuus L. Grown under Water Deficit Stress

et al. 2019

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“…It was concluded that the capacity of the energy dissipation and antioxidant enzyme system is crucial to mitigate the effects caused by drought, and the capacity to recover after re-watering was dependent on the severity and persistence of drought, adaptability, and recovery differences of the maize lines. The results provide a profound insight to understand the maize functional traits' responses to drought stresses and re-watering.Agronomy 2020, 10, 533 2 of 17 reported [2], which is one of the most important environmental factors limiting crop productivity worldwide [3]. Especially in arid and semi-arid regions, water availability is insufficient to satisfy plant needs.…”

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confidence: 99%

“…Agronomy 2020, 10, 533 2 of 17 reported [2], which is one of the most important environmental factors limiting crop productivity worldwide [3]. Especially in arid and semi-arid regions, water availability is insufficient to satisfy plant needs.…”

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confidence: 99%

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

et al. 2020

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The drought tolerance and capacity to recover after drought are important for plant growth and yield. In this study, two maize lines with different drought resistance were used to investigate the effects of different drought durations and subsequent re-watering on photosynthetic capacity, electron transfer and energy distribution, and antioxidative defense mechanisms of maize. Under short drought, maize plants decreased stomatal conductance and photosynthetic electron transport rate, and increased NPQ (Non-photochemical quenching) to dissipate excess excitation energy in time and protect the photosynthetic apparatus. With the increased drought duration, NPQ, antioxidase activity, PItotal (total performance index), ∆I/Io, ψEo (quantum yield for electron transport), φEo (efficiency/probability that an electron moves further than QA−), δRo (efficiency/probability with which an electron from the intersystem electron carriers is transferred to reduce end electron acceptors at the PSI acceptor side) and φRo (the quantum yield for the reduction of the end electron acceptors at the PSI acceptor side) were significantly reduced, while Y(NO) (quantum yield of nonregulated energy dissipation) and MDA (malondialdehyde) began to quickly increase. The photosynthetic rate and capacity of photosynthetic electron transport could not recover to the level of the plants subjected to normal water status after re-watering. These findings indicated that long drought damaged the PSI (photosystem I) and PSII (photosystem II) reaction center and decreased the electron transfer efficiency, and this damage could not be recovered by re-watering. Different drought resistance and recovery levels of photosynthetic performance were achieved by different maize lines. Compared with D340, D1798Z had higher NPQ and antioxidase activity, which was able to maintain functionality for longer in response to progressive drought, and it could also recover at more severe drought after re-watering, which indicated its higher tolerance to drought. It was concluded that the capacity of the energy dissipation and antioxidant enzyme system is crucial to mitigate the effects caused by drought, and the capacity to recover after re-watering was dependent on the severity and persistence of drought, adaptability, and recovery differences of the maize lines. The results provide a profound insight to understand the maize functional traits’ responses to drought stresses and re-watering.

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“…Drought stress affects crop yield and quality through its negative influence on seed germination, seedling growth, photosynthesis, and transpiration [1]. We found that A. thaliana plants overexpressing Gh4CL7 had longer roots but a lower germination rate than WT plants under the osmotic stress conditions, suggesting that Gh4CL7 played a negative role in seed germination, but a positive role in promoting root elongation under the osmotic stress conditions.…”

Section: Discussionmentioning

confidence: 80%

“…Cotton is an important cash crop in many developing countries and frequently grown in dry lands or on supplementary irrigation [1], because agricultural water consumption can no longer be expanded thanks to water competition among domestic, industrial and agricultural users. The quantity and quality of fiber produced by cotton plants are directly related to water available to them during their developmental stages.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Gh4CL gene family reveals a role of Gh4CL7 in drought tolerance

Sun

Xiong

Zhang

et al. 2019

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Background The function of 4-coumarate-CoA ligases (4CL) under abiotic stresses have been studied in plants, however, limite is known about the upland cotton 4CL genes and their roles in response to drought stress. ResultsIn this study, we performed genome-wide identification of the 4CL genes in G. hirsutum and investigated the expression profiles of the identified genes in various cotton tissues and in response to stress conditions with an aim to identify 4CL gene(s) associated with drought tolerance. We identified 34 putative 4CL genes in G. hirsutum that were clustered into three classes. Genes of the same class usually share a similar gene structure and motif composition. Many cis -elements related to stress and phytohormone responses were found in the promoters of the Gh4CL genes. Of the 34 Gh4CL genes, 26 were induced by at least one abiotic stress and 10 were up-regulated under the PEG simulated drought stress conditions, including Gh4CL7 . Virus-induced gene silencing (VIGS) in cotton and overexpression (OE) in Arabidopsis thaliana were applied to investigate the biological function of Gh4CL7 in drought tolerance. The Gh4CL7 -silencing cotton plants showed more sensitive to drought stress, probably due to decreased relative water content (RWC), chlorophyll content and antioxidative enzyme activity, increased stomatal aperture, and the contents of malondialdehyde (MDA) and hydrogen peroxide (H 2 O 2 ). Arabidopsis lines overexpressing Gh4CL7 , however, were more tolerant to drought treatment, which was associated with improved antioxidative enzyme activity, reduced accumulation of MDA and H 2 O 2 and up-regulated stress-related genes under the drought stress conditions. In addition, compared to their respective controls, the Gh4CL7 -silencing cotton plants and the Gh4CL7-overexpressing Arabidopsis lines had a lower and higher lignin content, respectively. Taken together, these results demonstrated that Gh4CL7 could positively respond to drought stress and therefore might be a candidate gene for improvement of drought tolerance in cotton.Conclusion We comprehensively identified 4CL family genes in upland cotton and provide valuable information on the evolutionary relationship. Gh4CL7 gene is involved in lignin biosynthesis and play a positively role in reponsing drought stress.

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Drought stress in sunflower: Physiological effects and its management through breeding and agronomic alternatives

Cited by 309 publications

References 116 publications

Integrative Effects of Rice-Straw Biochar and Silicon on Oil and Seed Quality, Yield and Physiological Traits of Helianthus annuus L. Grown under Water Deficit Stress

Integrative Effects of Rice-Straw Biochar and Silicon on Oil and Seed Quality, Yield and Physiological Traits of Helianthus annuus L. Grown under Water Deficit Stress

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

Characterization of the Gh4CL gene family reveals a role of Gh4CL7 in drought tolerance

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