Effects of Seawater Salinity and Temperature on Growth and Pigment Contents in Hypnea cervicornis J. Agardh (Gigartinales, Rhodophyta)

Table 2

The morphological changes of H. cervicornis in process of cultivation.

Conditions of culture∖days of culture	0 d	5 d	10 d	15 d
15°C, 25		Thin thalli, light purple, with few branches	Thalli thickening, color further lightened, with a few of branches increase	Thalli thickened, pale purple, with branches increase
15°C, 30
15°C, 35
15°C, 40
15°C, 45
15°C, 50		Thalli softened with some whitened and died	A part of thalli whitened and died	Most part of thalli whitened and died
20°C, 25		Thin thalli, light purple, with few branches	Thalli thickened gradually, light purple, with a few of branches increase	Thalli thickened, pale purple, with branches increasing significantly
20°C, 30
20°C, 35				Thalli thickened, pale purple, with branches increase
20°C, 40
20°C, 45				Thalli thickened, pale purple, with a few of branches increase
20°C, 50	Thin thalli, purple, with few branches	Thalli softened with some whitened and died	Most part of thalli whitened and died	Most part of thalli died
25°C, 25		Growth of thalli in good condition and thickening, purple, branches start increasing	Thalli thickened, light purple, with branches increasing significantly	Thalli thickened, pale purple with slight green, many branches with a few died
25°C, 30
25°C, 35			Thalli thickened, light purple, with branches increase	Thalli thickened, pale purple with slight green, many branches with a part died
25°C, 40		Few of thalli whitened and died	Thalli thickened, light purple, with branches increase, few died	Thalli thickened, pale purple with slight green, with many branches, most part of thalli died
25°C, 45		Thalli died significantly	Part of thalli died	Most part of thalli died
25°C, 50			Most part of thalli died	All thalli died
30°C, 25		Growth of thalli in good condition and thickening, purple, with branches increase	Thalli thickened, light purple, with branches increasing significantly, a few died	Thalli thickened, light purple with slight green, with many branches, a part died
30°C, 30
30°C, 35
30°C, 40		Few of thalli whitened and died	Thalli thickened, light purple, with branches increase, a few died	Thalli thickened, pale purple with slight green, with many branches, most part died
30°C, 45		Thalli died significantly	Most part of thalli died	Most part of thalli died
30°C, 50			Most part of thalli died	All thalli died