2.4.1.13 abscisic acid as well as treatments like spikelet thinning, leaf cutting increase enzyme expression and enzyme activity during rice grain filling 704879 2.4.1.13 actin activity of SuSy2 in breakdown direction is stimulated by 60% 660272 2.4.1.13 allantoin activation, sucrose synthesis 488555 2.4.1.13 Ca2+ only for sucrose synthesis 488577 2.4.1.13 fructose 2,6-bisphosphate stimulates SuSy2 in presence of actin 660272 2.4.1.13 Mg2+ 2-4fold activation of sucrose synthesis, not cleavage 488567 2.4.1.13 Mg2+ only for sucrose synthesis 488577 2.4.1.13 Mn2+ 2-4fold activation of sucrose synthesis, inhibition of cleavage 488567 2.4.1.13 additional information increase of enzyme activity in synthezising direction in leaves during fruit development, increase of enzyme activity in synthezising and in degrading direction in mesocarp tissue during fruit development 706750 2.4.1.13 additional information peak of activities at the 21th day post anthesis, higher activity in the cultivar with a high starch content 706742 2.4.1.13 additional information when suffering hypoxia stress from flooding, CsSUS3 expression and SUS activity in roots increase, especially in the lateral roots. The soluble SUS activity increases, but the membrane fraction hardly changes 736966 2.4.1.13 nitrate 50% activation at 3-5 mM, exogenous nitrate at 14.2 mM absorbed in the form of KNO3 and Ca(NO3)2 during 10-20 days exponentially activates the enzyme in the roots by 22-100% as compared with plants grown on nitrogen-free medium. Under low light, nitrate can not activate sucrose synthase 706740 2.4.1.13 NO3 20.8% increase of activity at 2 mM 757316 2.4.1.13 spermine 0.07 mM spermine treatment significantly increases the enzyme activity at 15 and 35 days after post anthesis 757492 2.4.1.13 sucrose exogenous, as well as treatments like spikelet thinning, leaf cutting increase enzyme expression and enzyme activity during rice grain filling 704879 2.4.1.13 UDP-D-xylose activation of epicotyl and cotyledon isozymes 488543