Associations between drought resistance, regrowth and quality in a perennial C4 grass

Zhou, Yi; Lambrides, Christopher J.; Fukai, S.

doi:10.1016/j.eja.2014.12.007

Cited by 9 publications

(9 citation statements)

References 32 publications

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“…Furthermore, two of the mutants, S2‐40‐5 and S1‐100‐1, have substantially higher stolons with shorter internodes, which could provide production advantages for sod farmers. Consumers demand high sod strength to facilitate easy handling and planting (Zhou et al, 2015). Sod strength combines characteristics of several plant parts, including stolons, rhizomes, and roots, knitting together in a soil medium (Emmons 2000; de Lima et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Gamma‐Ray Irradiation Improves Turfgrass Characteristics of St. Augustinegrass

2016

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St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] is a warm‐season turfgrass with medium to high shade tolerance, a valuable trait for use in lawns, particularly in smaller residential landscapes and other green spaces where trees are dominant. However, their long internodes and very coarse leaf and stolon texture are undesirable in home lawns and public spaces. Gamma (γ) irradiation has been used to induce useful variations for various morphological traits in turfgrass breeding. The objective of the present study was to induce dwarf and semidwarf phenotypes from two St. Augustine germplasms, S1 and S2, irradiated with 50, 100, 150, or 300 Gy and 20, 40, 80 or 120 Gy respectively, using a 60Co source. The lethal does (LD50) for S1 and S2 genotypes were 95 and 103 Gy, respectively. The linear reduction of survival rate with increasing gamma rays was highly correlated (r2 = 0.96 and 0.87). The 15 morphological mutants (0.35% of the irradiated plants) with a semidwarfed growth habits were identified among 4301 node cuttings. The mutant lines exhibited up to 40% shorter plant height and finer leaf and stolon texture than parental genotypes. Mutant lines developed in this study may offer improved St. Augustinegrass cultivars for landscaping.

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Section: Resultsmentioning

confidence: 99%

Gamma‐Ray Irradiation Improves Turfgrass Characteristics of St. Augustinegrass

2016

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“…Resources including soluble carbohydrates, starch, mineral nutrients, and soluble protein stored in stolon nodes and internodes may be responsible for plant survival and regeneration in order to cope with severe disturbance when plants are disturbed by various biotic and abiotic factors [ 4 , 41 , 42 , 43 ]. The content of carbohydrates in stolon nodes and internodes was positively correlated with the survival rate of stoloniferous plants [ 44 ].…”

Section: Discussionmentioning

confidence: 99%

Reallocation of Soluble Sugars and IAA Regulation in Association with Enhanced Stolon Growth by Elevated CO2 in Creeping Bentgrass

et al. 2022

Plants

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Extensive stolon development and growth are superior traits for rapid establishment as well as post-stress regeneration in stoloniferous grass species. Despite the importance of those stoloniferous traits, the regulation mechanisms of stolon growth and development are largely unknown. The objectives of this research were to elucidate the effects of the reallocation of soluble sugars for energy reserves and endogenous hormone levels for cell differentiation and regeneration in regulating stolon growth of a perennial turfgrass species, creeping bentgrass (Agrostis stolonifera L.). Plants were grown in growth chambers with two CO2 concentrations: ambient CO2 concentration (400 ± 10 µmol mol−1) and elevated CO2 concentration (800 ± 10 µmol mol−1). Elevated CO2 enhanced stolon growth through increasing stolon internode number and internode length in creeping bentgrass, as manifested by the longer total stolon length and greater shoot biomass. The content of glucose, sucrose, and fructose as well as endogenous IAA were accumulated in stolon nodes and internodes but not in leaves or roots under elevated CO2 concentration. These results illustrated that the production and reallocation of soluble sugars to stolons as well as the increased level of IAA in stolon nodes and internodes could contribute to the enhancement of stolon growth under elevated CO2 in creeping bentgrass.

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“…Studies of drought‐resistant genotypes of bermudagrass ( Cynodon spp.) have attributed greater canopy regrowth rate to increased rhizome production (Zhou, Lambrides, & Fukai, 2014, 2015). Whether or not alteration of carbohydrate reserves or allocation to different plant parts occurs in response to drought stress at elevated CO 2 deserves further attention in future work.…”

Section: Discussionmentioning

confidence: 99%

Effects of elevated carbon dioxide on drought tolerance and post‐drought recovery involving rhizome growth in Kentucky bluegrass

2020

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Drought tolerance and rapid post‐stress recovery are critical survival strategies for turfgrass management in areas with limited rainfall and irrigation. This study sought to determine whether elevated CO2 could improve drought tolerance in rhizomatous Kentucky bluegrass (Poa pratensis L.) by protecting rhizomes from stress damage and promote regrowth and regeneration of daughter plants from rhizomes upon rewatering. Plants (cv. ‘Baron’) were grown at elevated CO2 concentration (800 μl L−1) or ambient CO2 concentration (400 μl L−1) for 28 d and then exposed to well‐irrigated conditions (control) or drought stress by withholding irrigation for an additional 28 d, followed by rewatering in growth chambers. Elevated CO2–treated plants had significantly higher leaf relative water content, visual quality, and membrane stability during drought compared with ambient CO2–treated plants. Rhizome nodes of elevated CO2–treated plants maintained significantly higher viability and lower content of abscisic acid and auxin under drought stress. In response to rewatering, plants previously exposed to drought stress under elevated CO2 exhibited increased growth of new shoots measured as total shoot biomass and daughter‐plant biomass, and an increased number of rhizomes, as well as greater canopy density compared with plants at ambient CO2. This study suggested that elevated CO2 concentration was able to protect rhizomes from drought damage and reactivate rhizomes for regeneration of new plants when drought was relieved by irrigation.

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Associations between drought resistance, regrowth and quality in a perennial C4 grass

Cited by 9 publications

References 32 publications

Gamma‐Ray Irradiation Improves Turfgrass Characteristics of St. Augustinegrass

Gamma‐Ray Irradiation Improves Turfgrass Characteristics of St. Augustinegrass

Reallocation of Soluble Sugars and IAA Regulation in Association with Enhanced Stolon Growth by Elevated CO2 in Creeping Bentgrass

Effects of elevated carbon dioxide on drought tolerance and post‐drought recovery involving rhizome growth in Kentucky bluegrass

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