Predication of Photosynthetic Leaf Gas Exchange of Sugarcane (Saccharum spp) Leaves in Response to Leaf Positions to Foliar Spray of Potassium Salt of Active Phosphorus under Limited Water Irrigation

Abstract

Sufficient water and fertilizer inputs in agriculture play a major role in crop growth, production, and quality. In this study, the response of sugarcane to limited water irrigation and foliar application of potassium salt of active phosphorus (PSAP) for photosynthetic responses were examined, and PSAP's role in limited water irrigation management was assessed. Sugarcane plants were subjected to limited irrigation (95−90 and 45−40% FC) after three months of germination, followed by a foliar spray (0, 2, 4, 6, and 10 M) of PSAP. The obtained results indicated that limited water irrigation negatively affected sugarcane growth and reduced leaf gas exchange activities. However, the application of PSAP increased the photosynthetic activities by protecting the photosynthetic machinery during unfavorable conditions. Mathematical modeling, a Skewed model, was developed and compared with the existing Gaussian model to describe the photosynthetic responses of sugarcane leaves under the limited irrigation with and without PSAP application. The models fitted well with the observed values, and the predicted photosynthetic parameters were in close relationship with the obtained results. The Skewed model was found to be better than the Gaussian model in describing the photosynthetic parameters of plant leaves positioned over a stem of limited water irrigation and applied PSAP application and is recommended for further application.

Exploration of silicon functions to integrate with biotic stress tolerance and crop improvement

“…The experiments showing the impact of Si on plant tolerance to environmental stresses [ 3 , 24 – 28 ] have been carried out at physiological, molecular and ecological levels [ 12 , 29 – 31 ]. The current research articles published on the mitigation of plant stress by Si demonstrates the interest in this area [ 3 , 11 , 22 , 32 , 33 ]. However, none of the researchers took into account the possibility of Si interacting with fundamental plant omics.…”

Investigation of Defensive Role of Silicon during Drought Stress Induced by Irrigation Capacity in Sugarcane: Physiological and Biochemical Characteristics

“…3,5−8 The stressed plants provoke anatomical and ultracellular injuries of subcellular organelles, viz., chloroplasts and mitochondria. 9,10 Water stress induces biosynthesis of reactive oxygen species (ROS) in plants to cause oxidative damage which leads to enzyme inactivation, loss of protein, and ionic imbalance 6,11 because plants possess an efficient antioxidant defense system. 12 Photosynthetic leaf gas exchange and growth characteristics are regulated by environmental variables.…”

“…9,10,19,20 Different forms of silicon could be used as biotic and abiotic stress mitigators 8,13,21 along with its beneficial effects on plant growth and productivity during stress. 8,10,22 It has also been noted that Si may get accumulated in the walls of the epidermal and vascular tissues of monocots 22,23 to enhance water uptake transport 13,24,25 along with antioxidant enzymes 26 and photosynthetic capacity. 14,19, S. officinarum L. is a major agricultural cash crop for sugar and bioethanol production worldwide.…”

Drenched Silicon Suppresses Disease and Insect Pests in Coffee Plant Grown in Controlled Environment by Improving Physiology and Upregulating Defense Genes

“…Numerous experiments show the impact of Si on plant tolerance to environmental stresses [ 24 , 25 , 26 , 27 , 28 , 29 ]. The amount of research articles currently published on the mitigation of plant stress by Si demonstrate the level of interest in this area [ 24 , 30 , 31 , 32 , 33 ]. However, the underlying Si-mediated mode of action to enhance plant resistance to disease and insect pests is unclear.…”