globalchange  > 气候变化与战略
DOI: 10.1016/j.flora.2019.151535
论文题名:
Photochemical activity in early-developmental phases of Agave angustifolia subsp. tequilana under induced global warming: Implications to temperature stress and tolerance
作者: Aragón-Gastélum J.L.; Ramírez-Benítez J.E.; González-Durán E.; González-Salvatierra C.; Ramírez-Tobías H.M.; Flores J.; Gutiérrez-Alcántara E.J.; Méndez-Guzmán E.; Jarquín-Gálvez R.
刊名: Flora: Morphology, Distribution, Functional Ecology of Plants
ISSN: 3672530
出版年: 2020
卷: 263
语种: 英语
英文关键词: Anthocyanins ; Asparagaceae ; Chlorophyll fluorescence ; Climate change ; Leaf pigments ; Open-top chambers
Scopus关键词: carotenoid ; chlorophyll ; global warming ; monocotyledon ; open-top chamber ; pigment ; potential temperature ; temperature tolerance ; Agave ; Agave angustifolia ; Asparagaceae
英文摘要: Agave species are a key component of the structure vegetation in the American drylands and have various anthropogenic uses. Agave angustifolia subsp. tequilana is an economically and culturally important Mexican species. Negative impacts on biodiversity are expected as a consequence of global warming; however, it has been documented that some Agave species are not affected by projected warming. Previous studies on some succulent species under induced global warming have shown a certain level of tolerance to temperature stress. We evaluated the potential temperature stress tolerance of two early developmental phases of A. angustifolia subsp. tequilana, by means of the following photochemical parameters: maximum quantum efficiency of photosystem II (Fv/Fm); effective quantum yield of PSII (ΦPSII); electron transport rate (ETR); non-photochemical quenching (NPQ); and pigment content (total chlorophyll, carotenoids and anthocyanins) in two-year-old plants and five-year-old plants under induced warming. Temperature and vapor pressure deficit (VPD) were higher in open-top chamber (OTCs) induced warming treatment than control plots, reproducing current climatic conditions. Both developmental phases showed high Fv/Fm values in both OTCs and control plots. Two-year-old plants displayed higher NPQ values than five-year-old plants under warming. The ΦPSII and ETR values were low in both warming treatments and developmental phases. Low anthocyanin content was found in both treatments and developmental phases. Independently of warming, the two-year-old plants showed higher total chlorophyll and carotenoid content values than the five-year-old plants. Despite that induced warming affected the photochemical activity of A. angustifolia subsp. tequilana, the high NPQ and pigment values indicate that this species has a high tolerance to future global warming. Our results provide novel evidence of the high physiological tolerance that could act in the early developmental phases of a key Agave species to cope the effects of global warming. © 2019 Elsevier GmbH
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159460
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作者单位: Facultad de Ciencias Químico-Biológicas, Universidad Autónoma de Campeche. Avenida Ing. Humberto Lanz Cárdenas y Fraccionamiento Ecológico Ambiental Siglo XXIII. Colonia. Ex Hacienda Kalá, San Francisco de Campeche, Campeche 24085, Mexico; Cátedras CONACYT-Tecnológico Nacional de México, Instituto Tecnológico de Chetumal, Avenida Insurgentes No. 330, Colonia David Gustavo Gutiérrez, Chetumal, Quintana Roo 77013, Mexico; Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, Km. 14.5 Carretera San Luis Potosí-Matehuala, Ejido Palma de la Cruz, Soledad de Graciano Sánchez, S.L.P. 78321, Mexico; IPICYT-División de Ciencias Ambientales, Camino a la Presa San José No. 2055, Colonia Lomas 4a. Sección, San Luis Potosí, S.L.P. 78216, Mexico

Recommended Citation:
Aragón-Gastélum J.L.,Ramírez-Benítez J.E.,González-Durán E.,et al. Photochemical activity in early-developmental phases of Agave angustifolia subsp. tequilana under induced global warming: Implications to temperature stress and tolerance[J]. Flora: Morphology, Distribution, Functional Ecology of Plants,2020-01-01,263
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