Plants in their natural habitats adapt to drought stress in the environment through a variety of mechanisms, ranging from transient responses to low soil moisture to major survival mechanisms of escape by early flowering in absence of seasonal rainfall. However, crop plants selected by humans to yield products such as grain, vegetable, or fruit in favorable environments with high inputs of water and fertilizer are expected to yield an economic product in response to inputs. Crop plants selected for their economic yield need to survive drought stress through mechanisms that maintain crop yield. Studies on model plants for their survival under stress do not, therefore, always translate to yield of crop plants under stress, and different aspects of drought stress response need to be emphasized. The crop plant model rice ( Oryza sativa) is used here as an example to highlight mechanisms and genes for adaptation of crop plants to drought stress.

Plant adaptation to drought stress.

https://biblio.ugent.be/publication/8563178/file/8563179.pdf

The Pivotal Role of Ethylene in Plant Growth

Acclimation and Tolerance Strategies of Rice under Drought Stress

https://www.cell.com/trends/plant-science/pdf/S1360-1385(15)00257-5.pdf

Source-Sink Communication: Regulated by Hormone, Nutrient, and Stress Cross-Signaling.

Plants capture solar energy and atmospheric carbon dioxide (CO2) through photosynthesis, which is the primary component of crop yield, and needs to be increased considerably to meet the growing global demand for food. Environmental stresses, which are increasing with climate change, adversely affect photosynthetic carbon metabolism (PCM) and limit yield of cereals such as rice (Oryza sativa) that feeds half the world. To study the regulation of photosynthesis, we developed a rice gene regulatory network and identified a transcription factor HYR (HIGHER YIELD RICE) associated with PCM, which on expression in rice enhances photosynthesis under multiple environmental conditions, determining a morpho-physiological programme leading to higher grain yield under normal, drought and high-temperature stress conditions. We show HYR is a master regulator, directly activating photosynthesis genes, cascades of transcription factors and other downstream genes involved in PCM and yield stability under drought and high-temperature environmental stress conditions.

/pdf/coordinated-regulation-of-photosynthesis-in-rice-increases-3zx1tbywhb.pdf

Coordinated regulation of photosynthesis in rice increases yield and tolerance to environmental stress

/pdf/identification-of-genes-directly-regulated-by-a-4knatlwsca.pdf

Lutfor Rahman

Papers

Coordinated regulation of photosynthesis in rice increases yield and tolerance to environmental stress

Identification of genes directly regulated by a transcription factor in rice