Cowpea development under different temperatures and carbon dioxide concentrations

Abstract

<jats:p>ABSTRACT The increase of CO2 concentrations and temperatures may affect the plant development and production. This study aimed to evaluate the impact of the increased temperature and carbon dioxide concentration on the development of cowpea cultivars. The experiment was conducted in growth chambers, with control of CO2 and temperature. A completely randomized design was carried out, in a 4 x 3 x 2 factorial arrangement [cultivar x temperature (day/night) x CO2], with three replicates. The duration of the cowpea vegetative and reproductive phases was evaluated and, at the end of the experiment, the number of pods per plant, number of grains per pod, seed weight, shoot fresh and dry matter weight were quantified. Temperature affects the development of cowpea cultivars, and the temperatures of 29 ºC (day)/23 ºC (night) lead to a higher seed weight. The increase of CO2 leads to a higher number of pods and seeds and seed weight. The BRS Tapaihum cultivar presented the highest number of pods and seeds and seed weight. In addition, the temperatures of 32 ºC (day)/29 ºC (night) lead to a greater flower abortion in the BRS Pujante and BRS Tapaihum cultivars.</jats:p>

Modeling of Flowering Time in Vigna radiata with Approximate Bayesian Computation

“…[57], but also cowpea (Vigna unguiculata [L.] Walp.) [58,59] and grass species [60]. The considerable variation in crop responses to future climate was described for chickpea in previous studies for South Asia and East Africa [61].…”

Impacts of climate changes on risk zoning for cowpea in the Amazonian tropical conditions

“…Decreases in evapotranspiration and in the duration of the crop cycle for rainfed cowpea are also expected in different warming scenarios (Cavalcante Junior et al 2016). Angelotti et al (2020) found in a controlled growth chamber that some cowpea cultivars show higher dry matter production and number/weight of seeds under elevated CO 2 concentration (500 ppm). Besides yield increase of the plants, elevated CO 2 concentration improves plant water relations by reducing its stomatal conductance (Hatfield and Dold 2019) as observed for rice (Kumar et al 2019) and mung bean (Gao et al 2015).…”

Initial Growth of Cowpea Cultivars With an Increase of 4.8 ° C in Air Temperature / Crescimento Inicial De Cultivares De Feijão-Caupi Com Aumento De 4,8 ° C Na Temperatura Do Ar

“…Semi-arid regions are the more vulnerable to climate change and extreme temperature events (Djanaguiraman et al, 2018). The Brazilian semi-arid region has an average temperature of approximately 26 °C (Angelotti et al, 2020) and according to the data described by the Rules for Seed Analysis (Regras para Análise de Sementes -RAS) the ideal temperature for the germination of the cowpea is 25 °C (BRAZIL, 2009), so the increase in temperature predicted by the IPCC (2014) may affect the viability of the seeds.…”