Table 6 Effects of photosynthetic characteristics and fluorescence characteristics of leaves at flowering stage on the yield of E. plantagineum.

From: Effects of sowing date on photosynthetic characteristics, chlorophyll fluorescence and yield of different Echium plantagineum L. cultivars

Yield (y)

Total canopy CaR

x1

y = 64.8x1–5575.9 (R2 = 0.4688**)

Total canopy PeR

x2

y = − 64.8x2 + 904.1 (R2 = 0.4688**)

SPAD

x3

y = 62.245x3–2502.1 (R2 = 9007**)

Pn

x4

y = 124.12x–4738 (R2 = 0.8571**)

Gs

x5

y =  − 1226.9x + 1358 (R2 = 0.0829 ns)

Ci

x6

y =  − 11.476x6 + 2657 (R2 = 0.7546**)

Tr

x7

y = 580.98x7–3808.5 (R2 = 0.7576**)

WUE

x8

y =  − 198.46x8 + 1720.9 (R2 = 0.0104 ns)

Ls

x9

y = 4903.8x9–1923.2 (R2 = 0.7791**)

Fo

x10

y =  − 2.8101x10 + 1394.8 (R2 = 0.4142**)

Fm

x11

y =  − 0.0938x11 + 720.29 (R2 = 0.0015 ns)

Fv/Fm

x12

y = 6424.8x12–4483.2 (R2 = 0.6602**)

qP

x13

y = 5267.5x13–961.5 (R2 = 0.5331**)

NPQ

x14

y = 168.86x14 + 359.05 (R2 = 0.024 ns)

ETR

x15

y = 19.549x15–1341.7 (R2 = 0.9458**)

ΦpsII

x16

y = 11191x16–1131.1 (R2 = 0.9381**)

  1. * and ** are significantly correlation at P < 0.05 and P < 0.01, respectively.
  2. ns is not significantly correlation. CaR canopy light interception rate, PeR canopy light transmittance, Pn net photosynthetic rate, Gs stomatal conductance, Ci intercellular CO2 concentration, Tr transpiration rate, WUE water-use efficiency, Ls stomatal limitation, Fo Initial fluorescence, Fm Maximum fluorescence, Fv/Fm maximal quantum yield of PSII photochemistry, qP photochemical quenching coefficient, NPQ nonphotochemical quenching, ΦPSII actual photochemical efficiency of PSII, ETR electron transport rate.
Back to article page