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  • Open Access


    Changes of the Flowering Time of Trees in Spring by Climate Change in Seoul, South Korea

    Hyewon Kim1, Chanwoo Park2, Jong Hwan Lim2, Hye Woo Shin3,*

    Phyton-International Journal of Experimental Botany, Vol.89, No.4, pp. 1019-1033, 2020, DOI:10.32604/phyton.2020.010649

    Abstract Flowering onset has attracted much attention in ecological research as an important indicator of climate change. Generally, warmer temperatures advance flowering onset. The effect of climate warming on flowering onset is more pronounced in spring because the difference between atmospheric and water temperatures creates more rapid convection than in other seasons. We analyzed the correlation between 73 species of spring woody plants in Hongneung Arboretum in Seoul, South Korea and the spring minimum temperature and average precipitation over the past 50 years (1968–2018). The spring minimum temperature and average precipitation have increased over the past 50 years, resulting in the… More >

  • Open Access


    Pollen production in sunflower (Helianthus annuus L.) is affected by air temperature and relative humidity during early reproductive growth

    Astiz V1, LF Hernández2,3

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 297-302, 2013, DOI:10.32604/phyton.2013.82.297

    Abstract During microsporogenesis, sunflower florets might be exposed to episodes of day- and night-time temperatures exceeding 30 and 20 °C, respectively, that can affect pollen availability and consequently plant’s yield. The relationship between air temperature and relative humidity during the meiotic phase of microsporogenesis, and the quantity and quality of pollen produced by the flowers, were studied in two sunflower hybrids during two years. The hybrids were grown on irrigated plots in Bahía Blanca (38° 45’ S; 62° 11’ W) in three planting dates (PD) at a density of 5.6 plants/m2. Flowers were consecutively taken as anthesis progressed, sectorizing the capitulum… More >

  • Open Access


    Biomass production and grain yield of three sorghum lines differing in drought resistance

    Castro-Nava S1, J Ortiz-Cereceres2,†, M del C Mendoza-Castillo2, AJ Huerta3

    Phyton-International Journal of Experimental Botany, Vol.81, pp. 149-156, 2012, DOI:10.32604/phyton.2012.81.149

    Abstract The aim of this study was to determine the efficiency of drought classification criteria that we previously reported for our grain sorghum genotypes. Two tolerant genotypes of grain sorghum [Sorghum bicolor (L.) Moench] (UAT-124 and UAT-152) and one susceptible (UAT-30) were subjected to drought under greenhouse conditions at either panicle initiation, flag leaf, or flowering. Results showed that the effects of drought depended on when drought stress occurred during development. Biomass of the three sorghum genotypes was significantly reduced at the flag leaf stage (48%) by drought stress, but the greatest reduction occurred in the susceptible genotype UAT-30 (71%). Results… More >

  • Open Access


    Pitaya (Stenocereus stellatus) fruit growth is associated to wet season in Mexican dry tropic

    García-Suárez1 F, L Carreto-Montoya2, R Cárdenas-Navarro3, JC Díaz-Pérez4, R López-Gómez

    Phyton-International Journal of Experimental Botany, Vol.76, pp. 19-26, 2007, DOI:10.32604/phyton.2007.76.019

    Abstract In this work we contribute to the knowledge of the reproductive phenology of Stenocereus stellatus (Pfeiffer,Riccobono), a columnar cactus that produces fruits of high commercial perspectives known as “pitayas”. This kind of pitayas are produced for local commercialization in back orchards in some regions of the Mexican dry tropics. These fruits are produced only in the apical part of the cactus “arms”. Our results show that fruit development of pitayas is highly associated to the rainy season of the year. This behavior is different from the reproductive strategy of other columnar cactus species that produce other kinds of pitaya in… More >

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