References
- Alvim FC, Carolino SM, Cascardo JC, et al. (2001). Enhanced accumulation of BiP in transgenic plant confers tolerance to water stress. Plant Physiol 126:1042–54
- Arnon DI. (1949). Copper enzymes in isolated chloroplasts: Polyphenoloxidase in Beta vulgaris. Plant Physiol 24:1–15
- Baki GKA-E, Siefritz F, Man H-M, et al. (2000). Nitrate reductase in Zea mays L. under salinity. Plant Cell Environ 23:515–21
- Borgognone D, Colla G, Rouphael Y, Cardarelli M, et al. (2013). Effect of nitrogen form and nutrient solution pH on growth and mineral composition of self-grafted and grafted tomatoes. Sci Hortic 149:61–9
- Bybordi A, Tabatabaei J, Ahmadov A. (2009). Effects of salinity and NO3:NH4 ratio on yield and quality in Canola (Brassica napus L.). Not Sci Biol 1:67–72
- Chang J, Liu D, Cao HQ, Chang SX, et al. (2010). − N/ − N ratios affect the growth and N removal ability of Acorus calamus and Iris pseudacorus in a hydroponic system. Aquat Bot 93:216–20
- Chen W, Luo JK, Shen QR. (2005). Effect of − N/ − N ratios on growth and some physiological parameters of Chinese cabbage cultivars. Pedosphere 15:310–8
- Chen YH, Guo QS, Zhu ZB, Zhang LX. (2012). Changes in bioactive components related to the harvest time from the spicas of Prunella vulgaris. Pharm Biol 50:1118–22
- Chen YH, Yu MM, Zhu ZB, et al. (2013). Optimisation of potassium chloride nutrition for proper growth, physiological development and bioactive component production in Prunella vulgaris L. PLoS ONE 8:e66259 . doi:10.1371/journal.pone.0066259
- Chen YH, Guo QS, Liu L, et al. (2011). Influence of fertilization and drought stress on the growth and production of secondary metabolites in Prunella vulgaris L. J Med Plants Res 5:1749–55
- Cheung HY, Zhang QF. (2008). Enhanced analysis of triterpenes, flavonoids and phenolic compounds in Prunella vulgaris L. by capillary zone electrophoresis with the addition of running buffer modifiers. J Chromatogr A 1213:231–8
- Chinese Pharmacopoeia Commission. (2010). Pharmacopoeia of the People's Republic of China. Beijing: China Medico-Pharmaceutical Science & Technology Puhlishig House
- Claussen, W. (2002). Growth, water use efficiency, and proline content of hydroponically grown tomato plants as affected by nitrogen source and nutrient concentration. Plant Soil 247:199–209
- Cook NC, Samman S. (1996). Flavonoids-chemistry, metabolism, cardioprotective effects, and dietary sources. J Nutr Biochem 7:66–76
- Cruz LJ, Cagampang GB, Juliano BO. (1970). Biochemical factors affecting protein accumulation in the rice grain. Plant Physiol 46:743–7
- Guo SW, Zhou Y, Shen QR, Zhang F. (2007a). Effect of ammonium and nitrate nutrition on some physiological processes in higher plants – growth, photosynthesis, photorespiration, and water relations. Plant Biol 9:21–9
- Guo SW, Chen G, Zhou Y, Shen QR. (2007b). Ammonium nutrition increases photosynthesis rate under water stress at early development stage of rice (Oryza sativa L.). Plant Soil 296:115–24
- Guo XR, Zu YG, Tang ZH. (2012). Physiological responses of Catharanthus roseus to different nitrogen forms. Acta Physiol Plant 34:589–98
- Hadži-Tašković Šukalović V. (1986). Activity and distribution of nitrogen-metabolism enzymes in the developing maze kernel. Physiol Plantarum 67:247–52
- Hoagland DA, Arnon DJ. (1950). The Water Culture Method for Growing Plants Without Soil. Circular 347. Berkeley (CA): California Agricultural Experimental Station
- Jiang SJ, Zhao LZ, Yu YG, et al. (2008). Study on optimization of supercritical fluid extraction conditions of ursolic acid from Prunella vulgaris Linn. leaves. Food Sci 29:294–7
- Kotsiras A, Olympios CM, Drosopoulos J, Passam HC. (2002). Effect of nitrogen form and concentration on the distribution of ions within cucumber fruit. J Am Sci Hort 95:175–83
- Lee EJ, Paek KY. (2012). Effect of nitrogen source on biomass and bioactive compound production in submerged cultures of Eleutherococcus koreanum Nakai adventitious roots. Biotechnol Prog 28:508–14
- Letchamo W, Polydeonny LV, Gladishev NO, et al. (2002). Factors affecting Echinacea quality. In: Janick J, Whipkey A, eds. Trends in New Crops and New Uses. Alexandria (VA): JASHS Press, 514–21
- Liu CZ, Guo C, Wang YC, Ouyang F. (2003). Factors influencing artemisinin production from shoot cultures of Artemisia annua L. World J Microb Biot 19:535–8
- Liu J. (1995). Pharmacology of oleanolic acid and ursolic acid. J Ethnopharmacol 49:57–68
- Liu L, Zhu ZB, Guo QS, et al. (2012). Variation in contents of major bioactive compounds in Glechoma longituba related to harvesting time and geographic distribution. J Med Plants Res 6:122–8
- Lu YL, Xu YC, Shen QR, Dong CX. (2009). Effects of different nitrogen forms on the growth and cytokinin content in xylem sap of tomato (Lycopersicon esculentum Mill.) seedlings. Plant Soil 315:67–77
- Naik PM, Manohar SH, Murthy HN. (2011). Effects of macro elements and nitrogen source on biomass accumulation and bacoside A production from adventitious shoot cultures of Bacopa monnieri (L.). Acta Physiol Plant 33:1553–7
- Pinkas M, Trotin F, Peng M, Torck M. (1994). Use, chemistry and pharmacology of ten Chinese medicinal plants. Fitoterapia 55:343–53
- Prasad A, Mathur A, Singh M, et al. (2012), Growth and asiaticoside production in multiple shoot cultures of a medicinal herb, Centella asiatica (L.) Urban, under the influence of nutrient manipulations. J Nat Med 66:383–7
- Praveen N, Murthy HN. (2013). Withanolide A production from Withania somnifera hairy root cultures with improved growth by altering the concentrations of macro elements and nitrogen source in the medium. Acta Physiol Plant 35:811–16
- Psotová J, Kolár M, Sousek J, et al. (2003). Biological activities of Prunella vulgaris extract. Phytother Res 17:1082–7
- Psotová J, Svobodova A, Kolarova H, Walterova D. (2006). Photoprotective properties of Prunella vulgaris and rosmarinic acid on human keratinocytes. J Photochem Photobiol B 84:167–74
- Ruan J, Gerendás J, Härdter R, Sattelmacher B. (2007). Effect of nitrogen form and root-zone pH on growth and nitrogen uptake of tea (Camellia sinensis) plants, Ann Bot 99:301–10
- Tabatabaei SJ, Fatemi L, Fallahi E. (2006). Effect of ammonium:nitrate ratio on yield, calcium concentration, and photosynthesis rate in strawberry. J Plant Nutr 29:1273–85
- Tabatabaei SJ, Yusefi M, Hajiloo J. (2008). Effects of shading and NO3:NH4 ratio on the yield, quality and N metabolism in strawberry. Sci Hortic 116:264–72
- Taghavi TS, Babalar M, Ebadi A, et al. (2004). Effects of nitrate to ammonium ratio on yield and nitrogen metabolism of strawberry (Fragaria x Ananassa cv. Selva). Int J Agri Biol 6:994–7
- Tang ZH, Liu YJ, Guo XR, Zu YG. (2011). The combined effects of salinity and nitrogen forms on Catharanthus roseus: The role of internal ammonium and free amino acids during salt stress. J Plant Nutr Soil Sci 174:135–44
- Wang HH, Wang ZZ, Guo WB. (2008). Comparative determination of ursolic acid and oleanolic acid of Macrocarpium officinalis (Sieb. et Zucc.) Nakai by RP-HPLC. Ind Crop Prod 28:328–32
- Wang JW, Tan RX. (2002). Artemisinin production in Artemisia annua hairy root cultures with improved growth by altering the nitrogen source in the medium. Biotechnol Lett 24:1153–6
- Xu XJ, Li QY, Song XH, et al. (2012). Dynamic regulation of nitrogen and organic acid metabolism of cherry tomato fruit as affected by different nitrogen forms. Pedosphere 22:67–78
- Yu MM, Liu L, Guo QS, et al. (2011). Influence of nitrogen forms ratios on growth and photosynthetic characteristics in Prunella vulgaris. China J Chin Materia Med 36:530–4
- Zhang LZ, Qin W, Zhang XH. (2007). Assay method for contents of caffeic acid and rosmarinic acid in the different parts of Prunella vulgaris L. J Beijing Univ Trad Chin Med 30:343–5