Drought priming induces thermo-tolerance to post-anthesis high-temperature in offspring of winter wheat

Zhang, Xiaxiang; Xiu-lin, Wang; Zhong, Jianwen; Zhou, Qin; Wang, Xiao; Cai, Jian; Dai, Tingbo; Cao, Weixing; Jiang, Dong

doi:10.1016/j.envexpbot.2016.03.004

Cited by 55 publications

(27 citation statements)

References 51 publications

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“…CAT is the first line antioxidant enzyme [ 53 ], APX and GR are the key components of the Ascorbate-Glutathione (AsA-GSH) pathway which mitigates the harmful effects of ROS [ 54 ]. A previous study reported that drought-primed wheat plants activate their enzymatic antioxidant defense system to subsequent heat stress to alleviate the oxidative damage [ 55 ]. The findings of this study were supported by [ 19 , 56 ] as drought-hardening improved the enzymatic plant defense system, thus conferring drought tolerance.…”

Section: Discussionmentioning

confidence: 99%

Drought-hardening improves drought tolerance in Nicotiana tabacum at physiological, biochemical, and molecular levels

Khan

Shah

et al. 2020

BMC Plant Biol

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Background Drought stress is the most harmful one among other abiotic stresses with negative impacts on crop growth and development. Drought-hardening is a feasible and widely used method in tobacco seedlings cultivation. It has gained extensive interests due to its role in improving drought tolerance. This research aimed to investigate the role of drought-hardening and to unravel the multiple mechanisms underlying tobacco drought tolerance and adaptation. Results This study was designed in which various drought-hardening treatments (CK (no drought-hardening), T1 (drought-hardening for 24 h), T2 (drought-hardening for 48 h), and T3 (drought-hardening for 72 h)) were applied to two tobacco varieties namely HongHuaDaJinYuan (H) and Yun Yan-100 (Y). The findings presented a complete framework of drought-hardening effect at physiological, biochemical, and gene expression levels of the two tobacco varieties under drought stress. The results showed that T2 and T3 significantly reduced the growth of the two varieties under drought stress. Similarly, among the various drought-hardening treatments, T3 improved both the enzymatic (POD, CAT, APX) and non-enzymatic (AsA) defense systems along with the elevated levels of proline and soluble sugar to mitigate the negative effects of oxidative damage and bringing osmoregulation in tobacco plants. Finally, the various drought-hardening treatments (T1, T2, and T3) showed differential regulation of genes expressed in the two varieties, while, particularly T3 drought-hardening treatment-induced drought tolerance via the expression of various stress-responsive genes by triggering the biosynthesis pathways of proline (P5CS1), polyamines (ADC2), ABA-dependent (SnRK2, AREB1), and independent pathways (DREB2B), and antioxidant defense-related genes (CAT, APX1, GR2) in response to drought stress. Conclusions Drought-hardening made significant contributions to drought tolerance and adaptation in two tobacco variety seedlings by reducing its growth and, on the other hand, by activating various defense mechanisms at biochemical and molecular levels. The findings of the study pointed out that drought-hardening is a fruitful strategy for conferring drought tolerance and adaptations in tobacco. It will be served as a useful method in the future to understand the drought tolerance and adaptation mechanisms of other plant species. Graphical abstract Drought-hardening improved drought tolerance and adaptation of the two tobacco varieties. T1 indicates drought-hardening for 24 h, T2 indicates drought-hardening for 48 h, T3 indicates drought-hardening for 72 h

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Section: Discussionmentioning

confidence: 99%

Drought-hardening improves drought tolerance in Nicotiana tabacum at physiological, biochemical, and molecular levels

Khan

Shah

et al. 2020

BMC Plant Biol

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“…One of the effects of this repeated stress is that the plants can be hardened by the weaker stresses and thus be prepared to overcome a stronger stress more easily. Pretreatment with sublethal high temperatures can contribute to achieving temporary thermal tolerance and can defend plants from subsequent higher temperatures [19][20][21][22]. Most studies, however, have focused on crop responses to single heat stress periods.…”

Section: Introductionmentioning

confidence: 99%

Single versus repeated heat stress in wheat: What are the consequences in different developmental phases?

et al. 2021

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With a possible reference to heat priming and to characterize the extent and variation in the heat stress responses in wheat, the effects of single vs. repeated heat stresses were examined by measuring the changes in morphological and grain yield-related traits and photosynthetic parameters. To achieve these objectives, 51 winter wheat cultivars of various geographic origins were included in two independent experiments covering different phenological stages. In Experiment I, a single heat stress event was applied at stem elongation (SE) and booting (B), and the repeated heat stress was applied at both of these stages (SE+B). In Experiment II, the single heat stress was applied at stem elongation (SE) and full heading (CH), while the repeated heat stress was applied at both stages (SE+CH). While genotype was a more important factor for determining the morphological and yield-related traits, it was the treatment effect that mostly influenced the photosynthetic parameters, with the exception of the chlorophyll content. The heading stage was more sensitive to heat stress than the booting stage, which was primarily due to the larger decrease in the average seed number. The importance of biomass in contributing to grain yield intensified with the heat stress treatments. There was a large variation between the wheat cultivars not only in yielding abilities under control conditions but also in sensitivities to the various heat stresses, based on which 7 distinct groups with specific response profiles could be identified at a highly significant level. The 7 wheat groups were also characterized by their reaction patterns of different magnitudes and directions in their responses to single vs. repeated heat stresses, which depended on the phenological phases during the second cycle of heat stress. The possible association between these findings and heat priming is discussed.

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“…For wheat, flowering and seed filling are considered the most water-demanding stages, because water shortage may affect yields (Farooq, Hussain, & Siddique, 2014), cause oxidative damages (Farooq, Wahid, Kobayashi, Fujita, & Basra, 2009), increase foliar senescence (Yang, Zhang, Wang, Zhu, & Liu, 2003), reduce carbon fixation and assimilation (Asada, 2006), cause pollen sterility (Cattivelli et al, 2008), among other harmful effects. Thus, lack of water during the reproduction stage can diminish crop yields, the quantity, and quality of seeds produced, and is therefore considered an essential input for the achievement of vigorous and uniform plants (Crusciol, Arf, Zucareli, Sá, & Nakagawa, 2001;Farooq, Irfan, Aziz, Ahmad, & Cheema, 2013;Finch-Savage & Bassel, 2016;Zhang et al, 2016;Abid et al, 2018).…”

Section: Palavrasmentioning

confidence: 99%

Yield and physiological quality of wheat seeds produced under different irrigation depths and leaf Silicon

Gama

Oliveira

Pinheiro

et al. 2021

Semina: Ciênc. Agrár.

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Water availability is one of the main factors responsible for wheat productivity, as well as the quality of the produced seeds. Silicon (Si) has an important role in mitigating the effects of various biotic and abiotic stresses. Thus, Si application can be used to mitigate the effects of different irrigation depths on the production and quality of wheat seeds. The work aimed to evaluate the yield and physiological quality of wheat seeds produced from plants fertilized with leaf Si and grown under different irrigation depths. The experiment was laid out in a split-plot randomized block design, with four replications. The plots consisted of three irrigation depths (0, 50, and 100% of the total irrigation requirement [TIR]). In the subplots, Si treatments were allocated (without application [0 mM] and 5 mM SiO2, applied at the tillering stage). The following parameters were evaluated: water balance of the system; soil moisture; yield; thousand seed weight; germination; electrical conductivity; accelerated aging; seedling length and emergence. The water balance of the system was negative for the 0% TIN irrigation depth after anthesis and there was less soil moisture in this depth. There was no effect of irrigation depths and Si application on plant yield. The smaller irrigation depths imposed reduced the thousand seed weight and the electrical conductivity of the seeds produced. Plants fertilized with Si did not differ in germination, but they produced more vigorous seedlings with greater growth and uniformity.

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Drought priming induces thermo-tolerance to post-anthesis high-temperature in offspring of winter wheat

Cited by 55 publications

References 51 publications

Drought-hardening improves drought tolerance in Nicotiana tabacum at physiological, biochemical, and molecular levels

Drought-hardening improves drought tolerance in Nicotiana tabacum at physiological, biochemical, and molecular levels

Single versus repeated heat stress in wheat: What are the consequences in different developmental phases?

Yield and physiological quality of wheat seeds produced under different irrigation depths and leaf Silicon

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