Control seed produced moderate germination for R. parviflorus
(43%) and R. odoratus(72%). Both are small seeds with moderately
thick, soft seed coats and belong to subg. Anoplobatus . Differ-ences between the types of scarification and among germination
treatments were not significant for these species ( R. parviflorus;
p = 0.426, R. odoratus; p = 0.1191) (Table 3). Satomi and Naruhashi
(1971) noted that the seed of R. odoratushad a unique hilum posi-tion compared to the other Japanese Rubus they studied and they
emphasized that subg. Anoplobatus requires further investigation.
Our earlier study of 57 Rubus species, utilizing light and scan-ning electron microscopy, revealed that both species have a unique
hilar-end hole in the seed coat not found in the other subgenera
(Wada and Reed, 2008). This unique structure is not the hilum, but
is present at the tip of the seed on the end opposite the micropyle
(Fig. 1) and provides an open channel for water imbibition, result-ing in high germination of unscarified seed. None of the treatments
produced a significant increase in the already moderate to high
germination of the controls for these species ( Table 3).
Recorded seed viability indicated by TZ (Table 2) was similar
to the actual germination results of most genotypes ( Table 3) and
in the end indicated that more scarification was needed for some
species. Assessing seed-coat thickness and grading hardness are
important for proper scarification and the resulting germination
response for the specific genotypes. Scarification in this study was
based on subgenus and seed size, but not on the seed coat char-acteristics. The two species with low or no germination ( Table 3)
had large seeds and thick, extremely hard seed coats ( Table 2). With
the identification of seed-coat thickness and hardness as significant
factors in germination response, it now appears obvious that these
seeds required 2 to as much as 8 times longer scarification than
we used in this study. Moore et al. (1974)found that blackberry
hybrid seed averaged only 17% germination after a 3 h scarification
Control seed produced moderate germination for R. parviflorus(43%) and R. odoratus(72%). Both are small seeds with moderatelythick, soft seed coats and belong to subg. Anoplobatus . Differ-ences between the types of scarification and among germinationtreatments were not significant for these species ( R. parviflorus;p = 0.426, R. odoratus; p = 0.1191) (Table 3). Satomi and Naruhashi(1971) noted that the seed of R. odoratushad a unique hilum posi-tion compared to the other Japanese Rubus they studied and theyemphasized that subg. Anoplobatus requires further investigation.Our earlier study of 57 Rubus species, utilizing light and scan-ning electron microscopy, revealed that both species have a uniquehilar-end hole in the seed coat not found in the other subgenera(Wada and Reed, 2008). This unique structure is not the hilum, butis present at the tip of the seed on the end opposite the micropyle(Fig. 1) and provides an open channel for water imbibition, result-ing in high germination of unscarified seed. None of the treatmentsproduced a significant increase in the already moderate to highgermination of the controls for these species ( Table 3).Recorded seed viability indicated by TZ (Table 2) was similarto the actual germination results of most genotypes ( Table 3) andin the end indicated that more scarification was needed for somespecies. Assessing seed-coat thickness and grading hardness areสิ่งสำคัญสำหรับการ scarification และการงอกได้การตอบสนองสำหรับพันธุ์เฉพาะ Scarification ในการศึกษานี้ได้ใช้ subgenus และเมล็ดขนาด แต่ไม่ใช่ บนเมล็ดอักขระ-acteristics สองสายพันธุ์ที่ มีน้อยหรือไม่มีการงอก (ตาราง 3)มีเมล็ดขนาดใหญ่และหนา ยากมากเมล็ดเสื้อ (ตาราง 2) มีเมล็ดพันธุ์ตราหนาและแข็งเป็นสำคัญปัจจัยในการงอก ตอนนี้ปรากฏชัดที่เมล็ด 2 การ scarification 8 ครั้งได้มากเกินกว่าที่จำเป็นเราใช้ในการศึกษานี้ มัวร์และ al. (1974) พบว่าแบล็คเบอร์รี่ผสมเมล็ดเฉลี่ยเพียง 17% การงอกหลัง scarification 3 ชม
การแปล กรุณารอสักครู่..