Figure 1.
The experimental design. FWC – field water capacity, chlorophyll content (mg·cm−2), RWC – relative water content (%), SLA – specific leaf area (cm2·g−1), LA – leaf area (cm2), root volume (cm3), shoot length (cm), stem and root dry mass (%)
Figure 2.
Evolution of the chlorophyll content in the leaves of stressed and control Ginkgo biloba L. plants under different irrigation regimes, expressed in milligrams per square meter. The numbers 0–6 represent data collected at 2-week intervals (from the first of June to the seventh of September)
Figure 3.
Relative water content (RWC) in the leaves of stressed and control Ginkgo biloba plants under conditions of water stress. Numbers 0–6 represent data collected at 2-week intervals (from the first of June to the seventh of September)
Table 1.
LSD test for statistical significance of differences in the magnitude of mean values of leaf area (LA in cm2), specific leaf area (SLA in cm2·g−1) and relative leaf water content (RWC in %) of Ginkgo biloba L. plants under water stress
| Measured parameters | Variant | Count | P-value | Mean | Homogeneous groups group differences | |
|---|---|---|---|---|---|---|
| A (cm2) LA | S | 30 90 | 0.67 | 243,96 349.5 | A a | |
| C | 30 90 | 267,73 345.4 | B a | |||
| SLAt (cm2 · g−1) SLA | S | 30 90 | 0.0000 | 44,6167 45.6 | B a | |
| C | 30 90 | 40,9133 42.5 | A b | |||
| RWC (%) RWC | S | 309390 90 | 0.0104 | 91,23 91.6 | A b | |
| C | 309090 90 | 93,3933 94.5 | B a | |||
Table 2.
LSD test for statistical significance of differences in the magnitude of mean values of stem dry mass (%), root dry mass (%), root volume (cm3) and shoot length (cm) of Ginkgo biloba plants under water stress
| Measured parameters | Variant | Count | P-value | Mean | Homogeneous groups group differences |
|---|---|---|---|---|---|
| A cm2) Dry mass of stem | S | 30 30 | 0.0501 | 43.5 | a |
| C | 30 30 | 42.7 | a | ||
| Dry mass of rootsSLAt (cm2 × g−1) water contentw | S | 30 30 | 0.0000 | 32.5 | a |
| C | 30 30 | 27.2 | b | ||
| RWC (%) root amountRoot volume | S | 309390 30 | 0.0000 | 10 | b |
| C | 3030909030230 | 16.6 | a | ||
| Length of shoots | S | 30 | 0.0014 | 13.6 | b |
| C | 30303 | 21.1 | a |
Figure 4.
Leaf area (LA) of the top five ginkgo leaves from the stressed plant (S) and from the controlled plant (C) (software image J used)
Table 3.
LSD test for statistical significance of the differences in the magnitude of the mean values of leaf area (LA in cm2) and specific leaf area (SLA in cm2·g−1) of the top five leaves of Ginkgo biloba influenced by water stress
| Measured parameters | Variant | Count | P-value | Mean | Homogeneous groups group differences |
|---|---|---|---|---|---|
| LA | S | 30 30 | 0.0003 | 54.4 | b |
| C | 30 30 | 100 | a | ||
| SLASLAt (cm2 · g−1) water contentw | S | 30 30 | 0.2616 | 54 | a |
| C | 30 30 | 51 | a |