Hyewon Kim¹, Chanwoo Park², Jong Hwan Lim², Hye Woo Shin^3,*

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 >

Astiz V¹, LF Hernández^2,3

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 >

Castro-Nava S¹, J Ortiz-Cereceres^2,†, 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 >

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 >