Correlation of the corn compensatory growth mechanism after post-drought rewatering with cytokinin induced by root nitrate absorption

Wang, Xiaoling; Wang, Jingjing; Sun, Run Hong; Hou, Xiaogai; Zhao, Wei; Shi, Jianxin; Zhang, Youfu; Lin, Qingfeng; Li, Xuelin; Dong, Puhui; Zhang, Li Xia; Guo-li, XU; Gan, Hong-bing

doi:10.1016/j.agwat.2015.12.007

Cited by 42 publications

(34 citation statements)

References 36 publications

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“…In addition to biotic stress, abiotic stresses, such as drought, salinity and extreme temperatures are important factors that constrain agricultural productivity worldwide (Chen et al, 2013; Wang et al, 2016; Li et al, 2018). According to the stress response pattern of CaWRKY s reflected in Figure 6B, more than half (32/61) of CaWRKY genes were significantly induced by one or more biotic/abiotic stresses tested (osmotic stress, drought, heat, Pst DC3000 and B. cinerea ).…”

Section: Resultsmentioning

confidence: 99%

Comparative Genomic Analysis Reveals Extensive Genetic Variations of WRKYs in Solanaceae and Functional Variations of CaWRKYs in Pepper

et al. 2019

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As a conserved protein family, WRKY has been shown to be involved in multiple biological processes in plants. However, the mechanism of functional diversity for WRKYs in pepper has not been well elucidated. Here, a total of 223 WRKY members from solanaceae crops including pepper, tomato and potato, were analyzed using comparative genomics. A tremendous genetic variation among WRKY members of different solanaceous plants or groups was demonstrated by the comparison of some WRKY features, including number/size, group constitution, gene structure, and domain composition. The phylogenetic analysis showed that except for the known WRKY groups (I, IIa/b/c/d/e and III), two extra WRKY subgroups specifically existed in solanaceous plants, which were named group IIf and group IIg in this study, and their genetic variations were also revealed by the characteristics of some group IIf and IIg WRKYs. Except for the extensive genetic variations, certain degrees of conservatism for solanaceae WRKYs were also revealed. Moreover, the variant zinc-finger structure (CX 4,7 CX 22-24 HXC) in group III of solanaceae WRKYs was identified. Expression profiles of CaWRKY genes suggested their potential roles in pepper development and stress responses, and demonstrated a functional division pattern for pepper CaWRKYs. Furthermore, functional analysis using virus induced gene silencing (VIGS) revealed critical roles of two CaWRKYs (CaWRKY45 and CaWRKY58) in plant responses to disease and drought, respectively. This study provides a solid foundation for further dissection of the evolutionary and functional diversity of solanaceae WRKYs in crop plants.

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Section: Resultsmentioning

confidence: 99%

Comparative Genomic Analysis Reveals Extensive Genetic Variations of WRKYs in Solanaceae and Functional Variations of CaWRKYs in Pepper

et al. 2019

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“…Wang et al [ 13 ] reported that the leaf cytokinin concentration in rewatered corn plants is strongly influenced by roots. Rewatering plays a positive role on root function, thereby induced high leaf cytokinin concentration.…”

Section: Discussionmentioning

confidence: 99%

“…This stimulus is directly sensed by the roots. Wang et al [ 13 ] found that the roots contribute the compensatory growth of corn during post-drought rewatering by inducing leaf cytokinin. PPD plays an important role in root functions by affecting plant growth.…”

Section: Introductionmentioning

confidence: 99%

Effects of plant population density and root-induced cytokinin on the corn compensatory growth during post-drought rewatering

Wang

Qin

et al. 2018

PLoS ONE

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The effect of plant population density (PPD) and root-induced leaf cytokinin on the compensatory growth of potted corn seedlings during post-drought rewatering was investigated. The study design comprised four treatments: (1) wetness with low PPD, (2) wetness with high PPD, (3) rewatering with low PPD, and (4) rewatering with high PPD. Results showed that drought stress restrained the growth of corns. By contrast, rewatering enhanced the net photosynthetic rate and growth of corns. During the 8 days of rewatering, compensatory growth during post-drought rewatering occurred in corns with high PPD; however, such compensatory growth did not occur in corns with low PPD. Zeatin riboside concentrations in leaves and xylem saps were significantly higher under rewatering treatment than those under wet treatment. High leaf cytokinin concentration accelerated corn growth. The coefficients of variation and Gini-coefficient of wet treatment were significantly higher than those of rewatering treatment under high PPD, demonstrating that intense intraspecific competition occurred in the wet treatment. Extreme intraspecific competition negatively affected net photosynthetic rate. In brief, the interactions between root-induced leaf cytokinin and weak intraspecific competition promoted the compensatory growth under high PPD.

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“…Compensatory growth is the increase that occurs in plant growth rate following a period of stress, such as drought, or increased plant population density [100,101]. This compensatory growth is well documented in corn [30,96,100,101,102] and soybean [52,103]. The stress caused by soil insect pests feeding on young seedlings could have triggered this phenomenon of compensatory growth, which would explain the lack of difference in yield.…”

Section: Effects Of Neonicotinoids On Corn and Soybean Yieldsmentioning

confidence: 99%

Impacts of neonicotinoid seed treatments on soil-dwelling pest populations and agronomic parameters in corn and soybean in Quebec (Canada)

et al. 2020

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Agricultural soil pests, including wireworms (Coleoptera: Elateridae), are managed primarily with pesticides applied directly to seeds before sowing. Seeds coated with neonicotinoids have been used widely in Quebec (Canada) for several years. To assess the agronomic and economic value of neonicotinoid seed treatments in soybeans and corn in Quebec, trials were conducted from 2012 to 2016 in 84 fields across seven regions in Quebec. We evaluated the effect of neonicotinoid seed treatments on soil pest densities, crop damage and yield. The results showed that 92.6% of corn fields and 69.0% of soybean fields had less than 1 wireworm per bait trap. However, no significant differences in plant stand or yield were observed between treated and untreated corn or soybeans during the study. This study shows that neonicotinoid seed treatments in field crops in Quebec are useful in less than 5% of cases, given the very low level of pest-associated pressure and damage, and that they should not be used prophylactically. Integrated pest management (IPM) strategies need to be developed for soil insect pests to offer effective alternative solutions to producers.

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Correlation of the corn compensatory growth mechanism after post-drought rewatering with cytokinin induced by root nitrate absorption

Cited by 42 publications

References 36 publications

Comparative Genomic Analysis Reveals Extensive Genetic Variations of WRKYs in Solanaceae and Functional Variations of CaWRKYs in Pepper

Comparative Genomic Analysis Reveals Extensive Genetic Variations of WRKYs in Solanaceae and Functional Variations of CaWRKYs in Pepper

Effects of plant population density and root-induced cytokinin on the corn compensatory growth during post-drought rewatering

Impacts of neonicotinoid seed treatments on soil-dwelling pest populations and agronomic parameters in corn and soybean in Quebec (Canada)

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