Effect of drought on pigments, osmotic adjustment and antioxidant enzymes in six woody plant species in karst habitats of southwestern China

Responses to drought induced oxidative stress in five finger millet varieties differing in their geographical distribution

“…El-Tayeb (2006) has also cited that MDA content was lower in the leaves of droughttolerant Phaseolus acutifolius than in drought-sensitive Phaseolus vulgaris. Reduced electrolyte leakage under drought stress reflects better membrane integrity and tolerance towards oxidative stress (Liu et al 2011). Maximum drought induced damage to membrane integrity was recorded in the variety PES400 (Fig.…”

“…The variety PES400 recorded the lowest increase of 7.53 fold in proline level under stress, over that of control plants. Varietal differences in stress induced proline were clearly evident in finger millet, indicating a direct correlation between proline accumulation and differential oxidative stress tolerance response among different varieties of finger millet tested (Cao et al 2011;Liu et al 2011). Varietal differences in proline accumulation were also observed in wheat seedlings subjected to drought (Yadav et al 2004).…”

“…Several reports underline a direct relationship between enhanced antioxidant enzyme activities and increased tolerance to environmental stresses (Liu et al 2011;Sayfzadeh and Rashidi 2011).…”

Productivity and drought tolerance of cassava cultivars in the Coastal Tablelands of Northeastern Brazil

“…The averages, particularly in Frei Paulo, were higher than those reported by ALVES & SETTER (2004), to cassava plants grown under controlled greenhouse conditions (1.7µmol g -1 ) and similar to those reported by BABITA et al (2010) to 'castor beans', Ricinus communis, at India(3.9µmol g -1 ), and by SANTOS et al (2013), to 'pinhão manso', Jatropha curcas, at the Coastal Tableland area of Rio Largo-AL (5µmol g -1 ), under water deficit. Considering the proline accumulation as an indicator of drought tolerance on plants, in accordance to LIU et al (2011), due to the osmotic adjustment, it is suggested that proline content may contribute to drought tolerance unless on those cultivars with the highest contents.…”

“…Conversely, it has also been understood as an adaptive mechanism for plants suffering water shortage. During this time, a decrease in the solar radiation interception would contribute to reduce damage on photosynthetic apparatus caused by reactive oxygen molecules (MUNNÉ-BOSCH & ALEGRE, 2000;LIU et al, 2011).…”