Theme 01: Ecophysiology of Grasslands
Description
The objective of this study was to determine the influence of four water treatments (T1 = 75-100%, T2 = 50-75%, T3 = 25-50% and T4 = 0-25% of Field Water Capacity) on the concentration of water-soluble protein as growth reserve during three growth stages (vegetative, pipe and reproductive) in three plant parts (roots, stubble and leafs). The water-soluble protein concentration (WSPC) in the plants under the four water treatments differed (P≤0.01) among the plant parts as well as among growth stages (P≤0.05). WSPC in leafs increased (P≤0.01) with increased water stress from T1 to T4 for the pipe growth stage. For the vegetative and reproductive growth stages the WSPC increased (P≤0.01) from T1 to T2, decreased from T2 to T3 and increased again to T4 with concentration higher (P≤0.01) in T4 than T1, for the vegetative and reproductive growth stages. The WSPC in the roots differed (P≤0.01) across growth stages and water treatments. The results confirm that water-soluble protein growth reserve is influenced by the intensity of water stress and accumulation occurs with increased water stress, with the largest accumulation in the stubble.
Included in
Influence of Water Stress on Protein Concentration in Themeda triandra Forsk. in a Semi-Arid Climate of South Africa
The objective of this study was to determine the influence of four water treatments (T1 = 75-100%, T2 = 50-75%, T3 = 25-50% and T4 = 0-25% of Field Water Capacity) on the concentration of water-soluble protein as growth reserve during three growth stages (vegetative, pipe and reproductive) in three plant parts (roots, stubble and leafs). The water-soluble protein concentration (WSPC) in the plants under the four water treatments differed (P≤0.01) among the plant parts as well as among growth stages (P≤0.05). WSPC in leafs increased (P≤0.01) with increased water stress from T1 to T4 for the pipe growth stage. For the vegetative and reproductive growth stages the WSPC increased (P≤0.01) from T1 to T2, decreased from T2 to T3 and increased again to T4 with concentration higher (P≤0.01) in T4 than T1, for the vegetative and reproductive growth stages. The WSPC in the roots differed (P≤0.01) across growth stages and water treatments. The results confirm that water-soluble protein growth reserve is influenced by the intensity of water stress and accumulation occurs with increased water stress, with the largest accumulation in the stubble.
