Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition

Díaz, Alejandro Sandria; Aguiar, Guillermina; Pereira, Márcio Paulo; Castro, Evaristo Mauro de; Magalhães, P. C.; Pereira, Fabricio José

doi:10.1007/s10535-018-0773-8

Cited by 22 publications

(6 citation statements)

References 24 publications

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“…In addition to those mentioned above, there are many types of evidence indicating the effect of suboptimal P availability on aerenchyma formation in a well-aerated nutrient solution (Gahoonia et al, 2001;Díaz et al, 2018;Schneider and Lynch, 2018;Sou et al, 2019). There was a higher percentage of aerenchyma formation in the cortex of middle and basal sections of roots of both Pi-efficient and Pi-inefficient genotypes grown under P deficiency conditions.…”

Section: Discussionmentioning

confidence: 96%

Research Article Morphological, biochemical and molecular characterization of sorghum (Sorghum bicolor) genotypes contrasting for phosphate-use efficiency

Vasconcelos¹,

Figueiredo²,

Raghothama³

2020

Genet. Mol. Res.

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We compared three Pi-efficient (ATF-14B, ATF-53B, 101B) and four Pi-inefficient (ATF-16B, 116R, 136B, 187R) sorghum genotypes under different Pi concentrations. There were no significant differences between the groups in Pi-use efficiency under Pi-deprivation for anthocyanin accumulation, dry-weight matter, acid phosphatase activity (APA), and aerenchyma formation. However, both groups showed anthocyanin accumulation under Pi-deprivation. Under Pi-deficiency, there was a significant reduction of dry weight in both groups, with no significant differences between contrasting genotypes. All genotypes exhibited a significant increase in root/shoot ratios during Pi-deficiency, and these changes were not related to Pi-use efficiency. The total Pi content in roots and shoots in all genotypes was similar and represented less than 0.2 % of the total dry weight. For all genotypes, the Pi content in P+ treatment resulted in a significant variation ranging from 0.45 to 0.85% and 0.41 to 0.66% in roots and shoots, respectively. The genotype 187R had the highest P content in roots and shoots. APA activity showed increased activity only in the roots of both groups. The development of aerenchyma was conspicuous in the basal and in the middle root ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 19 (3): gmr18469 M.J.V. Vasconcelos et al. 2 sections of all genotypes grown under different Pi levels. Two sorghum Pi-transporter genes were strongly overexpressed in the middle part of Pi-deprived roots of 136B genotype. We did not find differences that explain the Pi-use efficiency between efficient and inefficient genotypes. More studies are needed to elucidate the complex mechanism of P-utilization by sorghum plants.

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Section: Discussionmentioning

confidence: 96%

Research Article Morphological, biochemical and molecular characterization of sorghum (Sorghum bicolor) genotypes contrasting for phosphate-use efficiency

Vasconcelos¹,

Figueiredo²,

Raghothama³

2020

Genet. Mol. Res.

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“…The increase amplitude induced by drought was significantly higher when P availability was 5 μM compared to 10 μM ( Figure 6 ). Many studies have shown that drought can amplify the effect of P deficiency by reducing the uptake of P, lowering the P concentration in cytoplasm, and reducing the ATP level in the chloroplast matrix ( Tezara et al., 1999 ; Radersma et al., 2005 ; Diaz et al., 2018 ; Pereira et al., 2023 ). In contrast, P application can alleviate the stress effect of drought by enhancing photosynthesis through increasing the content of chlorophyll, intercellular CO 2 concentration, and leaf area ( Tariq et al., 2017 ; Wu et al., 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Resource availability and parasitism intensity influence the response of soybean to the parasitic plant Cuscuta australis

Yuan

Gao

et al. 2023

Front. Plant Sci.

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IntroductionParasitic plants can damage crop plants and consequently cause yield losses and thus threaten food security. Resource availability (e.g., phosphorus, water) has an important role in the response of crop plants to biotic attacks. However, how the growth of crop plants under parasitism are affected by environmental resource fluctuation is poorly understood.MethodsWe conducted a pot experiment to test the effects of the intensity of Cuscuta australis parasitism and the availability of water and phosphorus (P) on soybean shoot and root biomass.Results and discussionWe found that low-intensity parasitism caused ~6% biomass reduction, while high-intensity parasitism caused ~26% biomass reduction in soybean. Under 5–15% water holding capacity (WHC), the deleterious effect of parasitism on soybean hosts was ~60% and ~115% higher than that under 45–55% WHC and 85–95% WHC, respectively. When the P supply was 0 μM, the deleterious effect of parasitism on soybean was 67% lower than that when the P supply was 20 μM. Besides, the biomass of C. australis was highest when both the water and the P availability were lowest. Cuscuta australis caused the highest damage to soybean hosts under 5 μM P supply, 5–15% WHC, and high-intensity parasitism. Additionally, C. australis biomass was significantly and negatively related to the deleterious effect of parasitism on soybean hosts and to the total biomass of soybean hosts under high-intensity parasitism, but not under low-intensity parasitism. Although high resource availability can promote soybean growth, the two resources have different impacts on the response of hosts to parasitism. Higher P availability decreased host tolerance to parasites, while higher water availability increased host tolerance. These results indicate that crop management, specifically water and phosphorus supply, can efficiently control C. australis in soybean. To our best knowledge, this appears to be the first study to test the interactive effect of different resources on the growth and response of host plants under parasitism.

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“…In addition, substantially elevated RCA and CCS have been observed in barley, wheat and rice exposed to water stress, which was shown to be the result of the development of an elevated number of xylem vessels [ 26 , 27 ]. Water stress also negatively affects the RCA in the root hairs of maize, but it improves the RCA of mature roots [ 28 ]. Zhu et al [ 29 ] demonstrated that the formation of RCA enhances the drought tolerance of maize, mainly because the adapted root architecture provides more airspace, which reduces the level of root respiration.…”

Section: Introductionmentioning

confidence: 99%

Maize (Zea mays L.) responses to salt stress in terms of root anatomy, respiration and antioxidative enzyme activity

Dong

et al. 2022

BMC Plant Biol

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Background Soil salt stress is a problem in the world, which turns into one of the main limiting factors hindering maize production. Salinity significantly affects root physiological processes in maize plants. There are few studies, however, that analyses the response of maize to salt stress in terms of the development of root anatomy and respiration. Results We found that the leaf relative water content, photosynthetic characteristics, and catalase activity exhibited a significantly decrease of salt stress treatments. However, salt stress treatments caused the superoxide dismutase activity, peroxidase activity, malondialdehyde content, Na+ uptake and translocation rate to be higher than that of control treatments. The detrimental effect of salt stress on YY7 variety was more pronounced than that of JNY658. Under salt stress, the number of root cortical aerenchyma in salt-tolerant JNY658 plants was significantly higher than that of control, as well as a larger cortical cell size and a lower root cortical cell file number, all of which help to maintain higher biomass. The total respiration rate of two varieties exposed to salt stress was lower than that of control treatment, while the alternate oxidative respiration rate was higher, and the root response of JNY658 plants was significant. Under salt stress, the roots net Na+ and K+ efflux rates of two varieties were higher than those of the control treatment, where the strength of net Na+ efflux rate from the roots of JNY658 plants and the net K+ efflux rate from roots of YY7 plants was remarkable. The increase in efflux rates reduced the Na+ toxicity of the root and helped to maintain its ion balance. Conclusion These results demonstrated that salt-tolerant maize varieties incur a relatively low metabolic cost required to establish a higher root cortical aerenchyma, larger cortical cell size and lower root cortical cell file number, significantly reduced the total respiration rate, and that it also increased the alternate oxidative respiration rate, thereby counteracting the detrimental effect of oxidative damage on root respiration of root growth. In addition, Na+ uptake on the root surface decreased, the translocation of Na+ to the rest of the plant was constrained and the level of Na+ accumulation in leaves significantly reduced under salt stress, thus preempting salt-stress induced impediments to the formation of shoot biomass.

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Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition

Cited by 22 publications

References 24 publications

Research Article Morphological, biochemical and molecular characterization of sorghum (<i>Sorghum</i> <i>bicolor</i>) genotypes contrasting for phosphate-use efficiency

Research Article Morphological, biochemical and molecular characterization of sorghum (<i>Sorghum</i> <i>bicolor</i>) genotypes contrasting for phosphate-use efficiency

Resource availability and parasitism intensity influence the response of soybean to the parasitic plant Cuscuta australis

Maize (Zea mays L.) responses to salt stress in terms of root anatomy, respiration and antioxidative enzyme activity

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