TY  - JOUR
T1  - Protective Action of Silicon on Water Relations and Photosynthetic Pigments in Pepper Plants Induced to Water Deficit
AU - , A.K.S. Lobato AU - , G.K. Coimbra AU - , M.A.M. Neto AU - , R.C.L. Costa AU - , B.G. Santos Filho AU - , C.F. Oliveira Neto AU - , L.M. Luz AU - , A.G.T. Barreto AU - , B.W.F. Pereira AU - , G.A.R. Alves AU - , B.S. Monteiro AU - , C.A. Marochio 
JO  - Research Journal of Biological Sciences
VL  - 4
IS  - 5
SP  - 617
EP  - 623
PY  - 2009
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2009.617.623
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2009.617.623
KW  - Capsicum annuum L.
KW  -silicon
KW  -abiotic stress
KW  -water restriction
KW  -pepper plants
AB  - The aim of the study was to investigate the responses promoted by the external application of silicon on water relations and photosynthetic pigments in <I>Capsicum annuum</I> L. plants submitted to water deficiency. The experimental design used was entirely randomized, with 5 treatments (stress, 0.25 &#956;M Si, 1.00 &#956;M Si, 1.75 &#956;M Si and control). The stomatal conductance was significantly influenced by the silicon, in which it were showed the values of 3.4, 16.4, 16.1, 13.7 and 24.3 mmol/m<SUP>2</SUP>/sec in stress, 0.25 &#956;M Si, 1.00 &#956;M Si, 1.75 &#956;M Si and control treatments, respectively. The chlorophyll a level in stress, 0.25 &#956;M Si, 1.00 &#956;M Si, 1.75 &#956;M Si and control treatments presented 4.07, 7.29, 8.04, 7.47 and 8.12 mg g<SUP>-1</SUP> FM, respectively. The results indicated that the silicon increased the tolerance to water deficit, in which the leaf relative water content, transpiration, stomatal conductance, chlorophylls a and b, as well as carotenoids were maintenanced in higher levels, if compared with stress plants. In addition, the ratio chlorophylls a/b under the 1.00 &#956;M Si was to improve that control treatment.
ER  -