Accumulation of water-soluble carbohydrates and gene expression in wheat stems correlates with drought resistance

Hou, Jingbo; Huang, Xin; Sun, Wan; Du, Chenyang; Wang, Chenyang; Xie, Yingxin; Ma, Ying; Ma, Dongyun

doi:10.1016/j.jplph.2018.09.017

Cited by 58 publications

(40 citation statements)

References 39 publications

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“…The contribution of osmoregulation of soluble sugars to drought tolerance of C7-2t Soluble sugars, including glucose, sucrose, maltose, and trehalose, play active roles in osmoregulation under drought stress [47][48][49]. In a drought-resistant wheat, the increased expression of soluble sugar synthesis-related genes explained its drought tolerance [50]. In the present study, the soluble sugar content in C7-2t was higher than that in C7-2 under the control and drought stress conditions (Fig.…”

Section: Fig 6 Qrt-pcr Comparison Of the Expression Of 18 Drought-rementioning

confidence: 99%

Identification of drought tolerant mechanisms in a drought-tolerant maize mutant based on physiological, biochemical and transcriptomic analyses

Zhang

Liu

et al. 2020

BMC Plant Biol

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Background: Frequently occurring drought stress negatively affects the production of maize worldwide. Numerous efforts have been made to develop drought-tolerant maize lines and to explore drought tolerant mechanisms in maize. However, there is a lack of comparative studies on transcriptomic changes between drought-tolerant and control maize lines. Results: In the present study, we have developed a drought-tolerant maize mutant (C7-2t) by irradiating the seeds of maize inbred line ChangC7-2 (C7-2) with 60 Co-γ. Compared to its wild type C7-2, C7-2t exhibited a significantly delayed wilting and higher drought tolerance under both the controlled and field conditions, indicating its high water-holding ability. Transcriptomic profiling was performed to identify differentially expressed genes (DEGs) between C7-2 and C7-2t during drought. As a result, a total of 4552 DEGs were implied in drought tolerance of C7-2 and C7-2t. In particular, the expression of photosynthesis-related genes in C7-2 was inhibited, whereas these genes in C7-2t were almost unaffected under drought. Moreover, a specific set of the DEGs were involved in phenylpropanoid biosynthesis and taurine (hypotaurine) metabolism in C7-2t; these DEGs were enriched in cell components associated with membrane systems and cell wall biosynthesis. Conclusions: The drought tolerance of C7-2t was largely due to its high water-holding ability, stable photosynthesis (for supporting osmoregulation) and strengthened biosynthesis of cell walls under drought conditions.

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Section: Fig 6 Qrt-pcr Comparison Of the Expression Of 18 Drought-rementioning

confidence: 99%

Identification of drought tolerant mechanisms in a drought-tolerant maize mutant based on physiological, biochemical and transcriptomic analyses

Zhang

Liu

et al. 2020

BMC Plant Biol

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“…In our study, WSC accumulation and translocation positively correlated to GY, which indicate that increasing stem WSC accumulation during the early grain-filling period and promoting its translocation during the late grain-filling period can potentially increase wheat grain yield. It has been previously reported that different stem internodes respond differently to the environment 37 , and stem WSC in the lower internodes have a greater role in grain yield than the upper internodes under drought 38 . Here, we also found that GY was significantly correlated with WSC accumulation in lower internodes and WSC translocation amount.…”

Section: Discussionmentioning

confidence: 97%

“…Another reason may be due to the environment conditions wheat cultivar planted. The underlying mechanism of high WSC accumulation and transport may lie in the expression profiles of fructan metabolism related genes; higher expression of genes related to fructan synthesis and degradation at WSC accumulation and translocation stage, respectively 37 . Thus, the close relationship between stem WSC and GY indicate that keeping high WSC content and accumulation could contribute to increasing GY.…”

Section: Discussionmentioning

confidence: 99%

“…Twenty stems of each plot were sampled at heading, at anthesis, 10 days after anthesis (DAS), and at the maturity stages. At maturity, the plants were separated into leaves, stems with leaf sheaths (these parts were cut into three segments: peduncle and lower internodes, according to Hou et al 37 ), chaff, and grain. The fresh samples were put into an oven at 105 °C for 30 min and then dried at 80 °C until they reached a constant weight for dry weight determination.…”

Section: Methodsmentioning

confidence: 99%

“…Water-soluble carbohydrates (WSc). WSC content was determined according to the method of Hou et al 37 . Briefly, the stem sample (0.10 g) was extracted with 80 °C water for 40 min, centrifuged (4,500 r min −1 , 20 min), and the supernatant was collected.…”

Section: Methodsmentioning

confidence: 99%

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Coordination of carbon and nitrogen accumulation and translocation of winter wheat plant to improve grain yield and processing quality

Huang

Wang

Hou

et al. 2020

Sci Rep

Self Cite

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the objective of this work was to characterize the accumulation of carbon (c) and nitrogen (n), and the translocation of wheat (Triticum aestivum L.) cultivars to achieve both high-quality and highyield. Twenty-four wheat cultivars, including 12 cultivars containing high-quality gluten subunit 5 + 10 at Glu-D1, and 12 cultivars with no Glu-D1 5 + 10, were planted at Yuanyang and Xuchang in Henan Province, during 2016-2017, and 2017-2018 cropping seasons. Wheat cultivars containing Glu-D1 5 + 10 had an advantage in grain quality traits. Significant difference (P < 0.05) was observed for grain protein concentration (GPC) between 5 + 10 group and no 5 + 10 group. Grain yield (GY) was significantly correlated with kernel number (KN)

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Photosynthetic organs contributions to grain yield genetic gains in Chilean winter wheat

2021

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Investigating the key traits associated with genetic gains in grain yield (GY) is essential for developing winter wheat (Triticum aestivum L.) breeding strategies. The study objectives were: (a) quantifying the photosynthetic contribution of flag leaf and ear to the grain filling; (b) analyzing if their contributions are associated with the genetic gains in GY; and (c) analyzing their relationship with other agronomical and physiological traits. Thus, six winter wheat genotypes of different release years were grown under optimal conditions in a greenhouse trial during 2019. Grain yield increased by 126 kg h -1 yr -1 , with the harvest index's change being the key factor affecting these gains. Compared to the control treatment, ear shading decreased ear contribution to grain filling by 16.35%, while both flag leaf and awn removal increased contribution to grain filling by 4.46 and 5.90%, respectively. Ear photosynthetic contribution estimated by source manipulation treatments showed a significant increase with the release year (0.54% yr -1 ). Whole ear gas exchange measures correlated positively with GY, and both dark respiration and gross photosynthesis showed positive correlations with the release year. The main findings of the study were: (a) GY gains in Chile were mainly due to the increased harvest index (HI), while the aerial biomass (AB) did not play a significant role in these gains; (b) the increased ear size besides the terminal heat stress during the study highlighted the ear role as the primary photosynthetic contributor to grain filling; and (c) using source manipulation techniques as an indirect selection trait for high ear photosynthesis appeared to be promising.

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Accumulation of water-soluble carbohydrates and gene expression in wheat stems correlates with drought resistance

Cited by 58 publications

References 39 publications

Identification of drought tolerant mechanisms in a drought-tolerant maize mutant based on physiological, biochemical and transcriptomic analyses

Identification of drought tolerant mechanisms in a drought-tolerant maize mutant based on physiological, biochemical and transcriptomic analyses

Coordination of carbon and nitrogen accumulation and translocation of winter wheat plant to improve grain yield and processing quality

Photosynthetic organs contributions to grain yield genetic gains in Chilean winter wheat

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