Botany Department, Faculty of Science, Fayoum University, Fayoum 63514, Egypt; and Green Materials Technology Department, Environment and Natural Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria 21934, Egypt.
Department of Botany and Microbiology, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt; and Department of Biology, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Kingdom of Saudi Arabia.
Funct Plant Biol. 2024 Sep;51. doi: 10.1071/FP24023.
Climate change-induced drought stress decreases crop productivity, but the application of β-sitosterol (BS) and biochar (BC) boosts crop growth and yield. A pot experiment was conducted to examine the effects of the alone and combined application of BS and BC on the growth and yield of Phaseolus vulgaris under drought stress. The synergistic application of BS and BC increased plant height (46.9cm), shoot dry weight (6.9g/pot), and root dry weight (2.5g/pot) of P. vulgaris plants under drought stress. The trend of applied treatments for photosynthetic rate remained as BC (15%)<BS (28%)<BC+BS (32%), compared to drought-stressed control. Similarly, the trend of applied treatments for water use efficiency was BS<BC<BC+BS, compared to drought stress control. The levels of malondialdehyde and hydrogen peroxide were reduced by the combined application of BS and BC under drought stress, measuring at 22.8 and 66.4μmol/gfresh weight, respectively. The combined use of BS and BC significantly alleviated drought stress more than when applied individually. Thus, employing BS and BC together as key agents in drought-stressed common bean plants could promote resilience, fostering growth amid ongoing climate change.
气候变化引起的干旱胁迫降低了作物的生产力，但β-谷甾醇（BS）和生物炭（BC）的应用可以促进作物生长和产量。本盆栽实验研究了 BS 和 BC 单独及联合施用对干旱胁迫下菜豆生长和产量的影响。BS 和 BC 的协同应用增加了干旱胁迫下菜豆植株的株高（46.9cm）、地上部干重（6.9g/盆）和地下部干重（2.5g/盆）。与干旱胁迫对照相比，各处理的光合速率趋势为 BC（15%）<BS（28%）<BC+BS（32%）。同样，与干旱胁迫对照相比，各处理的水分利用效率趋势为 BS<BC<BC+BS。BS 和 BC 的联合应用降低了干旱胁迫下丙二醛和过氧化氢的含量，分别为 22.8 和 66.4μmol/g 鲜重。BS 和 BC 的联合使用比单独使用时更能显著缓解干旱胁迫。因此，将 BS 和 BC 作为干旱胁迫下普通菜豆的关键药剂一起使用可以促进植物的弹性，在持续的气候变化中促进生长。
