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. 2021 Jul 20;6(30):19811–19821. doi: 10.1021/acsomega.1c02519

Table 1. Regression Analysis of Growth, Photosynthetic and Antioxidant Enzyme Activities during Soil Moisture Capacity, and Exogenous Si Application in Sugarcane Plants at Specific Time Durations.

parameters stress (days) model constants R(2)
PN 30 Penz_r_si = 7.529Si2 + 6.060Si + 3.114 0.992
  60 Penz_r_si = 1.544Si2 + 1.006Si + 3.159 0.999
  90 Penz_r_si = 1.018Si2 + 1.238Si + 3.134 0.998
gs 30 Penz_r_si = 1.270Si2 + 9.160Si + 4.195 0.996
  60 Penz_r_si = 1.024Si2 + 7.544Si + 3.197 0.999
  90 Penz_r_si = 1.251Si2 + 8.337Si + 3.211 0.997
E 30 Penz_r_si = 2.728Si2 + 2.235Si + 5.059 0.998
  60 Penz_r_si = 4.445Si2 + 3.520Si + 5.396 0.999
  90 Penz_r_si = 4.226Si2 + 3.875Si + 5.227 0.999
Fv/Fm 30 Penz_r_si = 3.038Si2 + 1.988Si + 1.234 0.991
  60 Penz_r_si = 1.667Si2 + 1.140Si + 1.151 0.990
  90 Penz_r_si = 2.646Si2 + 1.772Si + 1.388 0.978
RWC 30 Penz_r_si = 3.241Si2 + 2.630Si + 2.962 0.992
  60 Penz_r_si = 5.314Si2 + 3.456Si + 3.245 0.980
  90 Penz_r_si = 5.983Si2 + 3.923Si + 3.422 0.999
Chl a + b 30 Penz_r_si = 1.926Si2 + 1.747Si + 6.688 0.998
  60 Penz_r_si = 3.760Si2 + 2.767Si + 1.593 0.998
  90 Penz_r_si = 5.831Si2 + 3.857Si + 2.619 0.989
LAE 30 Penz_r_si = 1.000Si2 + 8.218Si + 3.171 0.987
  60 Penz_r_si = 2.207Si2 + 1.447Si + 3.803 0.999
  90 Penz_r_si = 1.760Si2 + 1.182Si + 5.221 0.999
SPAD 30 Penz_r_si = 1.185Si2 + 9.757Si + 9.544 0.998
  60 Penz_r_si = 1.072Si2 + 9.093Si + 1.231 0.978
  90 Penz_r_si = 1.088Si2 + 1.086Si + 1.818 0.999
biomass 30 Penz_r_si = 9.861Si2 + 2.910Si + 4.465 0.998
  60 Penz_r_si = 2.146Si2 + 1.351Si + 5.196 0.939
  90 Penz_r_si = 9.354Si2 + 1.881Si + 5.364 0.999
CAT 30 Penz_r_si = 2.969Si2 + 2.285Si + 1.074 0.974
  60 Penz_r_si = 1.098Si2 + 1.365Si + 1.203 0.993
  90 Penz_r_si = 4.610Si2 + 3.124Si + 1.386 0.952
APx 30 Penz_r_si = 9.726Si2 + 2.296Si + 3.513 0.946
  60 Penz_r_si = 8.068Si2 + 8.195Si + 4.757 0.991
  90 Penz_r_si = 2.320Si2 + 1.921Si + 1.025 0.978
SOD 30 Penz_r_si = 6.125Si2 + 4.500Si + 1.441 0.971
  60 Penz_r_si = 1.884Si2 + 4.395Si + 1.731 0.999
  90 Penz_r_si = 9.805Si2 + 1.861Si + 2.662 0.999