Physiological response of oil palm interspecific hybrids (Elaeis oleifera H.B.K. Cortes versus Elaeis guineensis Jacq.) to water deficit

Abstract

'U1937'='U1914'>'U1273'), and under water deficit ('U1937'>'U1914'>'U1859'>'U1273').]]>

Diurnal Variations in Water Potential and Gas Exchanges in Two-Hybrid Oil Palms Under Water Deficit

“…That is, for both hybrids the maximum A (8:00 h) in the irrigated plants varied between 7 and 8 μmoL m -1 s -1 , and for plants under water deficit 0.36 and 0.84 μmoL m -2 s -1 . Both Suresh et al (2012) and Méndez et al (2012) found no negative A values under stress conditions, which only occurred for BRS C 2501 and BRS Manicoré in the late afternoon.…”

“…In seedlings of oil palm hybrids, Suresh et al (2012) demonstrated that A drops from 6.20 μmoL m -2 s -1 in irrigated plants to 0.05 μmoL m -2 s -1 in plants subjected to water deficit, which Ψ w was around -3.5 to 4.0 MPa. Méndez et al (2012) observed that in oil palm hybrids, the decrease in Ψ w from -0.5 MPa to -2.0 MPa caused the reduction in A of mean values of 6.3 μmoL m -2 s -1 in irrigated plants and 0.8 μmoL m -2 s -1 in plants subjected to stress. In this experiment, the effects of water deficit on A of BRS C 2501 and BRS Manicoré were very similar to the results obtained by Suresh et al (2012) and Méndez et al (2012).…”

“…Méndez et al (2012) observed that in oil palm hybrids, the decrease in Ψ w from -0.5 MPa to -2.0 MPa caused the reduction in A of mean values of 6.3 μmoL m -2 s -1 in irrigated plants and 0.8 μmoL m -2 s -1 in plants subjected to stress. In this experiment, the effects of water deficit on A of BRS C 2501 and BRS Manicoré were very similar to the results obtained by Suresh et al (2012) and Méndez et al (2012). That is, for both hybrids the maximum A (8:00 h) in the irrigated plants varied between 7 and 8 μmoL m -1 s -1 , and for plants under water deficit 0.36 and 0.84 μmoL m -2 s -1 .…”

“…The water deficit negatively affects the water status of the plant, which can be evidenced by lower values of Ψ w presented by plants under water deficit about the respective irrigated plants. However, the magnitude of the change in the water status of the plant is an inherent response to each species (Carvalho et al, 2013;Cordeiro et al, 2009;Suresh et al, 2010) or even to different varieties, clones or hybrids of the same species (Méndez, Chacón, Bayona, & Romero, 2012;Pinheiro, Damatta, Chaves, Loureiro, & Ducatti, 2005;Suresh et al, 2012). For this reason, with the decrease in Ψ w , the g s exchange variables are negatively affected.…”

Chemical Characteristics and Nutritional Properties of Hybrid Palm Oils

“…Only in recent years, a wide range of characteristics of O×G interspecific hybrids has been thoroughly studied and described: yield and morphology [15][16][17][18][19]; phenological stages [20]; genome size [21,22]; sensitivity to water stress [23,24]; physiological and biochemical response to aluminum toxicity [25]; nutritional status [26]; seed germination [27]; fruit abscission process [28]; and mycorrhization process [29]. Even a comparative characterization of the physiological and biochemical performance of seedlings of O×G hybrids grown in hydroponics was carried out [30].…”