Ethylene and carbon dioxide: regulation of oat mesocotyl growth

Nishizawa, T.; Suge, Hiroshi

doi:10.1111/j.1365-3040.1995.tb00353.x

Cited by 16 publications

(7 citation statements)

References 26 publications

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“…Plant hormones are well-known to act as growth regulators and their concentrations change in response to numerous stresses (Hays et al, 2007 ; Ji et al, 2011 ). Both ABA and ethylene have been shown to exert dual effect on growth: stimulatory at low concentration (Ku et al, 1970 ; Suge, 1971 ; Nishizawa and Suge, 1995a , b ; Lehman et al, 1996 ; Smalle et al, 1997 ) while inhibitory at high (Pratt and Goeschl, 1969 ; Guzmán and Ecker, 1990 ; Kieber et al, 1993 ; Tanaka et al, 2013 ), a “dose-growth” response phenomenon known as “hormesis” (Pierik et al, 2006 ; Gressel and Dodds, 2013 ). Relatively few studies have examined the stimulatory properties of low concentrations of ABA and ethylene (Suge, 1971 ; Takahashi, 1972 ; Neskovic et al, 1977 ; Pierik et al, 2006 ), suggesting that low concentrations (≤ 0.1 μl L −1 or ≤ 0.1 μM) of ethylene and ABA stimulate organ growth to the extent that, across planta, varies widely (0% to >100%) depending on the timing of application, level of organization (e.g., cell, organ), plant species, seedling age, and the physiological and growth conditions.…”

Section: Introductionmentioning

confidence: 99%

Foliar Abscisic Acid-To-Ethylene Accumulation and Response Regulate Shoot Growth Sensitivity to Mild Drought in Wheat

et al. 2016

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Although, plant hormones play an important role in adjusting growth in response to environmental perturbation, the relative contributions of abscisic acid (ABA) and ethylene remain elusive. Using six spring wheat genotypes differing for stress tolerance, we show that young seedlings of the drought-tolerant (DT) group maintained or increased shoot dry weight (SDW) while the drought-susceptible (DS) group decreased SDW in response to mild drought. Both the DT and DS groups increased endogenous ABA and ethylene concentrations under mild drought compared to control. The DT and DS groups exhibited different SDW response trends, whereby the DS group decreased while the DT group increased SDW, to increased concentrations of ABA and ethylene under mild drought, although both groups decreased ABA/ethylene ratio under mild drought albeit at different levels. We concluded that SDW of the DT and DS groups might be distinctly regulated by specific ABA:ethylene ratio. Further, a foliar-spray of low concentrations (0.1 μM) of ABA increased shoot relative growth rate (RGR) in the DS group while ACC (1-aminocyclopropane-1-carboxylic acid, ethylene precursor) spray increased RGR in both groups compared to control. Furthermore, the DT group accumulated a significantly higher galactose while a significantly lower maltose in the shoot compared to the DS group. Taken all together, these results suggest an impact of ABA, ethylene, and ABA:ethylene ratio on SDW of wheat seedlings that may partly underlie a genotypic variability of different shoot growth sensitivities to drought among crop species under field conditions. We propose that phenotyping based on hormone accumulation, response and hormonal ratio would be a viable, rapid, and an early–stage selection tool aiding genotype selection for stress tolerance.

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Section: Introductionmentioning

confidence: 99%

Foliar Abscisic Acid-To-Ethylene Accumulation and Response Regulate Shoot Growth Sensitivity to Mild Drought in Wheat

et al. 2016

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“…To emerge from deep-sowing depths in the soil, some terrestrial plants respond to ethylene in a manner similar to semi-aquatic plants (Suge, 1971;Nishizawa and Suge, 1995;Suge et al, 1997a). Because seeds are sown very deep for insuring germination in arid areas, strong extension growth in soil is necessary for the tolerance response of seedlings to these deep-seeding conditions.…”

Section: Discussionmentioning

confidence: 99%

Responses of the First Internodes of Hong Mang Mai Wheat to Ethylene, Gibberellins and Potassium

Nishizawa¹,

Chen²,

Higashitani³

et al. 2002

Plant Production Science

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“…Ethylene (E) is a hormone produced from methionine, which inhibits the elongation of maize roots and the mesocotyl in darkness [ 133 , 134 , 135 ]. This effect on the mesocotyl is rescued by adding carbon dioxide (CO 2 ) [ 134 ].…”

Section: Maize ( Zea Mays L)mentioning

confidence: 99%

Primary Root and Mesocotyl Elongation in Maize Seedlings: Two Organs with Antagonistic Growth below the Soil Surface

Rodríguez

Cassab

2021

Plants

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Maize illustrates one of the most complex cases of embryogenesis in higher plants that results in the development of early embryo with distinctive organs such as the mesocotyl, seminal and primary roots, coleoptile, and plumule. After seed germination, the elongation of root and mesocotyl follows opposite directions in response to specific tropisms (positive and negative gravitropism and hydrotropism). Tropisms represent the differential growth of an organ directed toward several stimuli. Although the life cycle of roots and mesocotyl takes place in darkness, their growth and functions are controlled by different mechanisms. Roots ramify through the soil following the direction of the gravity vector, spreading their tips into new territories looking for water; when water availability is low, the root hydrotropic response is triggered toward the zone with higher moisture. Nonetheless, there is a high range of hydrotropic curvatures (angles) in maize. The processes that control root hydrotropism and mesocotyl elongation remain unclear; however, they are influenced by genetic and environmental cues to guide their growth for optimizing early seedling vigor. Roots and mesocotyls are crucial for the establishment, growth, and development of the plant since both help to forage water in the soil. Mesocotyl elongation is associated with an ancient agriculture practice known as deep planting. This tradition takes advantage of residual soil humidity and continues to be used in semiarid regions of Mexico and USA. Due to the genetic diversity of maize, some lines have developed long mesocotyls capable of deep planting while others are unable to do it. Hence, the genetic and phenetic interaction of maize lines with a robust hydrotropic response and higher mesocotyl elongation in response to water scarcity in time of global heating might be used for developing more resilient maize plants.

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Ethylene and carbon dioxide: regulation of oat mesocotyl growth

Cited by 16 publications

References 26 publications

Foliar Abscisic Acid-To-Ethylene Accumulation and Response Regulate Shoot Growth Sensitivity to Mild Drought in Wheat

Foliar Abscisic Acid-To-Ethylene Accumulation and Response Regulate Shoot Growth Sensitivity to Mild Drought in Wheat

Responses of the First Internodes of Hong Mang Mai Wheat to Ethylene, Gibberellins and Potassium

Primary Root and Mesocotyl Elongation in Maize Seedlings: Two Organs with Antagonistic Growth below the Soil Surface

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