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H. WALTER AND E. STADELMANN
Fig. 20. Length of hypocotyl and roots of Brassica napus seedlings related to
the degree of watering (left scale). Water content of the sand (in percent dry
weight) as mean value calculated from the total sand volume in the vessel. Upper
figure immediately after watering, lower figure after 11 days. The limit between
dry sand and wet sand indicates the penetration depth of water immediately after
watering. Right scale: osmotic potential of the press sap of the seedlings at termination of experiment. For water regimes of 4.3 and 1.7 initial water content plants
were too small to obtain press sap (after Kiecksee, 1964, Figs. 20a and 20b).
Fig. 21. Brassica seedlings growing in sand at different water content, 5 days after
germination, a, 15.5%; b, 6.7%; c, 4.3%; d, 2.5%; e, 1.3% of water content (a
group of three plants is shown for each sample) (after a photograph from Kiecksee,
1964).
H. WALTER AND E. STADELMANN
Fig. 20. Length of hypocotyl and roots of Brassica napus seedlings related to
the degree of watering (left scale). Water content of the sand (in percent dry
weight) as mean value calculated from the total sand volume in the vessel. Upper
figure immediately after watering, lower figure after 11 days. The limit between
dry sand and wet sand indicates the penetration depth of water immediately after
watering. Right scale: osmotic potential of the press sap of the seedlings at termination of experiment. For water regimes of 4.3 and 1.7 initial water content plants
were too small to obtain press sap (after Kiecksee, 1964, Figs. 20a and 20b).
Fig. 21. Brassica seedlings growing in sand at different water content, 5 days after
germination, a, 15.5%; b, 6.7%; c, 4.3%; d, 2.5%; e, 1.3% of water content (a
group of three plants is shown for each sample) (after a photograph from Kiecksee,
1964).