Study on the capsule and seed development of Cistanche deserticola
Field sampling surveys and laboratory studies were applied to study the capsule and seed development of Cistanche deserticola. The results showed: 1) The time from flowering to capsule dehiscence of C. deserticola was 35 d.The color of the capsule and seed experienced a white, brown and black change, when the color of the capsule changed from brown to black (30 d after flowering) was the appropriate harvest period of C. deserticola seeds. 2) 30 days after flowering,the length,width,fresh weight and dry weight per capsule of C. deserticola reached the maximum, with value of 17. 48 mm, 12. 33 mm,1. 620 g and 0. 295 g respectively. The capsule development of C. deserticola can be divided into three periods,the volume increasing stage, internal filling stage and the stable stage. 3) 25 days after flowering,the seed length and width of C. deserticola reached the maximum, 1.22 and 0.77 mm. 30 days after flowering, the fresh seed weight per capsule reached 0. 768 g whereas at day 35 after flowering,the dry seed weight per capsule reached the maximum 0.206 g. 4) 35 days after flowering, both the 1000-grain weight and seed plumpness reached the maximum while the proportion of small seeds (<0. 5 mm) decreased the minimum, with value of 0.086 7 g,85. 99% and 10. 23%, respectively. At day 35 after flowering, the seed germination rate reached the maximum 53. 3% .
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