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Plants being sessile have developed a sophisticated machinery to perceive and respond to continuously changing environmental conditions. The exogenous signal is perceived either via membrane bound receptors, cytosolic receptors or receptors associated with different intracellular organelles. After the perception of the signal, a cascade of events starts which transduce it to the plant gene machinery to modulate gene expression and in turn plant development. These signaling cascades may involve different events such as changed ca2+ ion homeostasis, phosphorylation/dephsphorylation reactions, protein-protein interactions and so on. Earlier, this whole cascade was believed to be linear i.e. one signal evoking only one signaling pathway but with the plethora of reports pouring in, it is becoming increasingly clear that all these signaling pathways interact with each other and rather than being linear they are intermingled and are part of a web. Broadly speaking, one stimulus rather than evoking one signaling event can interact with several other signaling pathways so as to optimally modulate plant growth and development. These signaling interactions can happen at any level i.e. sharing of signaling components by multiple pathways, or convergence of signaling pathways at the level of transcription factors or further downstream at the promoter of the affected gene itself. There are several reports existing in plants, where light, hormone, sugar and stress signaling pathways have been shown to be interacting. Our group at NIPGR has been involved in characterizing these molecular interactions using Arabidopsis thaliana as a modal plant. The information generated would be employed for improving agronomically important traits in crop plants.